The year of 2023 was the second-warmest on record for the UK, narrowly behind the record set as recently as 2022.
It was also the warmest year on record for Wales and Northern Ireland, second-warmest for England and third-warmest for Scotland.
In this review, we look back at the UK’s climate in 2023, the significant climate events that shaped the year and how human-caused climate change influenced them. We find:
- Eight of the 12 months of the year were warmer than average.
- Somewhat unusually, the warmest periods were in June and September, with the high summer months of July and August generally cooler and wetter.
- June was the hottest month of the year for the first time since 1966 and was the hottest June on record by a large margin.
- Through a climate attribution analysis, we show that a year as warm as 2023 has been made around 150 times more likely due to human-caused climate change.
- We would expect to reach or exceed the 2023 annual temperature in around 33% of years in the current climate.
- 2023 was relatively wet with 1,290mm of rainfall, making it the UK’s 11th wettest year in a series going back to 1836.
- The few wintery cold spells of the year were relatively short-lived.
- 2023-24 has seen the most active start to the storm season since naming storms began in 2015.
(See our previous annual analysis for 2022, 2021, 2020, 2019 and 2018.)
The year in summary
The Met Office produces the HadUK-Grid dataset for monitoring the UK climate. Using geostatistical methods, we combine UK observational data from land-based stations across the country into a gridded, geographically complete dataset.
There is enough coverage of observational data in our digital archives for national coverage of monthly temperature since 1884, rainfall since 1836 and sunshine since 1910. These are used to define long-running climate series and climatological averages, which provide context for variability and change in the UK’s climate through time.
The maps below show the average anomalies compared to 1991-2020 for temperature (left), rainfall (middle) and sunshine duration (right) across the UK during 2023. The darkest shading shows the areas of the country that saw the warmest (red), driest (brown) and sunniest (yellow) conditions relative to the baseline climate.
The maps show that 2023 was, for most of the country, a warm and wet year compared to average, with close to average sunshine overall. The exception to this being western Scotland which saw drier and sunnier conditions.
The UK annual average temperature was 9.97C for 2023, which is just 0.06C below the record high of 10.03C in 2022. This continues an observed warming of the UK climate since the 1960s.
The hottest year in the UK during the whole of the 20th century was 1997, with an average temperature of 9.41C. So far in the 21st century, 13 years have exceeded this value, meaning that the majority of years so far in the 21st century have exceeded what was the hottest year of the 20th century.
In contrast, the coldest year of the 21st century so far was 2010 (7.94C) which was more than 0.5C warmer than the coldest year of the 20th century in 1963 (7.40C).
While 2010 is an extreme-cold year in the context of the current UK climate, it would have been much closer to the average for the late 19th and early 20th century. Climate change has significantly reduced the occurrence and severity of cooler conditions in the UK.
Looking regionally, the map below colour-codes UK counties by the ranking of annual average temperature.
The darkest shade of red identifies those counties that recorded their warmest year in 2023. It was the warmest year on record for all of Northern Ireland and Wales, and also for counties in western England and south-west Scotland.
The year 2022 retains the record for the majority of England and Scotland, with the exception of far north Scotland (for which the warmest year on record was 2014), Western Isles (2006), Orkney (2003) and Shetland (2014).
In addition, 2023 is also provisionally the warmest year on record for Ireland in the 124 year national series maintained by Met Eireann.
Central England Temperature record
The year of 2023 was also the second-warmest year in the Met Office Central England Temperature series (CET), marginally behind 2022. The CET represents a region bounded by Hertfordshire, Worcestershire and Lancashire.
The chart below compares the records for the CET (black) and whole UK (red) for annual average temperature.
While there are inevitable differences in the precise ranking and anomalies of individual years between UK and CET, the series show the strong overall level of agreement. It also highlights how unusual the temperature of 2022 and 2023 are in the context of more than 360 years of observational data.
Extremes and rainfall
The UK climate monitoring network records both daily maximum and daily minimum temperatures.
Last year was the record highest for the annual average daily minimum temperature for the UK, England, Wales and Northern Ireland, and fourth highest for Scotland.
It was the highest annual average daily maximum temperature for Northern Ireland, second-highest for the UK, England and Wales, and third-highest for Scotland.
The year of 2023 was relatively wet with 1,290mm of rainfall, equivalent to 111% of UK average rainfall and putting it just outside the top 10 as the 11th wettest year in a series going back to 1836.
It was the sixth wettest March and July, seventh wettest October and ninth wettest December. In addition, 2023 is the only year that has four individual months within the top 10 wettest on record for the respective month.
The wet spells of March and July followed dry spells during February and June, but it was the higher-than-average rainfall through the autumn and into December that pushed up the annual accumulation for the year overall.
As the chart below shows, there has been an observed increase in UK annual rainfall over recent decades, with 2023 joining a cluster of notably wet years that have occurred since the late 1990s.
The lines show the annual rainfall (dark blue) and trend (black dashes), along with the 1991-2020 average (pink), 2023 total (brown) and the highest (red dashes) and lowest (blue dashes) annual totals on record.
The drivers of annual rainfall trends are complex as the annual total masks distribution of rainfall throughout the year and will respond to a multitude of factors, which will include human-caused climate change but also contributions from natural climate variability.
Attribution of UK annual mean temperature in 2023
Met Office scientists conducted an attribution study to quantify the influence of human-caused climate change on the likelihood of reaching a UK annual average temperature at or above that recorded in 2023.
The method uses an established Met Office system for rapid attribution of extreme events. The analysis uses observed values of the UK annual temperature and temperature data for the UK drawn from 14 climate model simulations from the sixth – and most recent – phase of the global Coupled Model Intercomparison Project.
The models are evaluated against the observational data across the period 1884-2014 using approaches commonly adopted for attribution studies. This determines whether they are suitable for use in the assessment and provide adequate representations of UK annual average temperature trends and variability.
One set of model simulations uses only natural climate forcings (“NAT”) for the period 1850-2020, while another set uses all natural and human-caused forcings (“ALL”) for the historical period and the SSP2-4.5 emissions scenario, often described as a “medium” emissions scenario, out to 2100.
These simulations are then able to provide estimates of the likelihood of the UK annual temperature exceeding the observed 2023 value for the following scenarios:
- A natural climate without human-caused greenhouse gases.
- The current climate taken as a 20-year period centred on 2023.
- An end-of-century climate under a medium emissions scenario taken as the period 2081-2100.
A reference baseline for all the experiments is the period 1901-30.
The estimated return period for a UK annual average temperature exceeding 9.97C in the NAT simulations is once every 460 years (with a range of 82 to 587). For the ALL simulations in the present day, this drops to once every three years (with a range of 2.86 to 3.17). For the ALL simulations in the future, this falls further and could see temperatures warmer than 2023 being exceeded more frequently than every other year.
Human-caused climate change is, therefore, estimated to have increased the likelihood of a year as warm as 2023 by a factor of more than 150.
These results are, unsurprisingly, very similar to an equivalent study conducted a year ago in relation to the record-breaking annual mean temperature of 10.03C set in 2022. Regarding that study, we stated:
“A warming climate means that an event that would have been exceptionally unlikely in the past has become one that we will increasingly see in the coming decades.”
Importantly, this analysis also indicates that 2022 and 2023 are not necessarily that extreme in the context of our current climate. This means that there is the potential for a far higher UK annual average temperature extreme even in the present-day climate. In addition, by the end of the 21st century, most years will be warmer than 2023.
Weather through the year
Temperature
The chart below tracks UK average temperatures through the year, with orange highlighting periods that were warmer than the 1991-2020 average for the time of year and blue were cooler than average.
Overall, 66% of days (240 days) were warmer than the 1991-2020 average for the time of year and 34% (125 days) were colder. The most notable warm spells were in June, September and December.
The highest maximum temperature of the year was 33.5C at Faversham (Kent) on 10 September, which is only the fifth time a highest maximum has been recorded in September. This is equal to the 1991-2020 average annual maximum temperature, so it is close to what we would expect as the highest UK temperature for a typical year. However, it is 2.3C higher than the average maximum during the earlier period of 1961-90 (31.2C).
In September, there was also a run of seven consecutive days with temperatures somewhere in the UK exceeding 30C, which is the longest such run in September on record.
The lowest temperature of the year was -16.0C, recorded at Altnaharra (Sutherland) on 9 March during a spell of wintry weather. This is 0.5C below the 1991-2020 average (-15.5C), but 3C above the 1961-90 average (-19.0C) for the year’s coldest day.
In 2023, both the hottest and coldest weather of the year occurred outside of the climatological summer and winter season, a reminder of the variable nature of the UK climate.
Both the highest maximum and lowest minimum temperature of the year for the UK have been increasing at a faster rate than the UK average temperature, reflecting that heat extremes are becoming more severe while cold extremes are becoming less severe in our warming climate.
Rainfall
For rainfall, the wettest periods were seen in March, July, October and December.
In the chart below, the rainfall accumulation is tracked through the course of the year. The solid black line is the 1991-2020 average, the grey shading reflects the variability across years with the red and blue marking the highest and lowest on record. Brown shading highlights points in the year where the total rainfall since the start of the year was below average, and blue regions are where it is above average.
The chart highlights that a dry spell in February was compensated by the wet March, and the dry spell through May and June was followed by a wet July, returning the year to near-average by the start of autumn.
Western Scotland was an exception to this rainfall pattern, with a somewhat drier autumn in particular, although wetter conditions in the east, including some extreme rainfall such as during storm Babet in October, meant that Scotland overall was still wetter than average. For England it was the sixth wettest year on record, third wettest for Northern Ireland, 12th for Wales and 32nd for Scotland.
Storms
The Met Office storm naming, first launched in 2015, provides a storm name list for the period from 1 September to 31 August each year in collaboration with Met Eireann and KNMI, the Irish and Dutch national weather services, respectively.
The 2022-23 storm season was rather notable for the relative absence of storms, with the only storms to be named under this scheme both occurring right at the end of the season in August – storms Antoni (5 August) and Betty (18-19 August).
In contrast, the 2023-24 season has experienced a much more active start with seven named storms from September to December, and the eighth (storm Henk) in early January 2024, which is the most active start to the named storm season since its inception in 2015.
| Storm Name | Dates affected UK | Maximum wind gust | Number of observing sites recording wind gusts over 50 knots |
|---|---|---|---|
| 2022-23 names | |||
| Otto | 17 February (named by Danish Meteorological Service) | 72 Kt (83mph) Inverbervie, Kincardineshire | 31 |
| Noa | 12 April (named by Meteo-France) | 83 Kt (96mph) Needles, Isle of Wight | 25 |
| Antoni | 5 August | 68 Kt (78mph) Berry Head, Devon | 2 |
| Betty | 18-19 August | 57 Kt (66mph) Capel Curig, Conwy | 5 |
| 2023-24 names | |||
| Agnes | 27-28 September | 73 Kt (84mph) Capel Curig, Conwy | 15 |
| Babet | 18-21 October | 67 Kt (77mph) Inverbervie, Kincardineshire | 16 |
| Ciarán | 1-2 November | 68 Kt (77mph) Langdon Bay, Kent | 11 |
| Debi | 13 November | 67 Kt (77mph) Aberdaron, Gwynedd | 21 |
| Elin | 9 December | 70 Kt (81mph) Capel Curig, Conwy | 13 |
| Fergus | 10 December | 64 Kt (74mph) Aberdaron, Gwynedd | 11 |
| Gerrit | 27-28 December | 77 Kt (89mph) Fair Isle, Shetland | 42 |
| Henk | 2 January 2024 | 82 Kt (94mph) Needles, Isle of Wight | 35 |
List of named storms for the 2022-23 and 2023-24 storm seasons
Overall, 2023 was calmer than average. This reflects a long-term decline in average wind speed, as illustrated in the chart below. This shows average UK wind speeds for each year since 1969 (dark blue line), the trend (black dashes), 1991-2020 average (pink), 2023 total (brown) and the highest (red dashes) and lowest (blue dashes) annual averages on record.
This long-term trend should be interpreted with some caution as it is possible that changes in instrumentation and exposure of the observing network through time may influence these trends. However, the decline is consistent with a widespread global slowdown termed “global stilling”.
More recently, global and UK data have shown that since 2010 the decline has stopped or even reversed.
Winter
After a notably wet spell at the start of the year – resulting in flooding across south Wales and Midlands on the 12 January – the late winter period was characterised by a very sunny January and very dry February overall.
It was the driest February since 1993 with much of central and southern England, which received less than 20% of the normal monthly rainfall.
The climatological winter season (1 December 2022 to 28 February 2023) was drier than average and – as discussed above – relatively calm with just one named storm (Otto) occurring in an otherwise dry February.
The chart below depicts UK winter rainfall per year (dark blue line) since 1836. While 2023 was relatively, but not exceptionally, dry in the context of recent decades, it is closer to the average for earlier in the series. The winter of 2022-23 had 83% of the 1991-2020 average rainfall, but 94% compared to the earlier period of 1961-90.
Comparing 1991-2020 to 1961-90, winter rainfall for the UK has risen by 14%. The increase is not uniform across the UK, however, with the greatest increases in excess of 20% across north and west Scotland, and smaller rises below 10% for central and southern England.
It is notable that, in a series stretching back to 1836, the five wettest winters have all occurred since 1990. The record wettest winter of 2013-14 had approximately double the rainfall of 2023, highlighting the large interannual variability in UK rainfall.
In contrast, at the time of writing, wet weather through the first half of the 2023-24 winter has resulted in widespread flooding across the country.
Climate variability is a critical driver in recent extremes of winter rainfall, while the emerging climate change signal resulting from increased moisture in the atmosphere is an important secondary factor contributing to the risk of wetter winters.
UK climate projections indicate a clear shift to higher probability of wet winters over the UK. This is caused by an increase in the number of wet days, an increase in intensity of rainfall, and a decrease in the proportion of winter precipitation falling as snow.
Spring
The first half of March was generally cold and resulted in some of the lowest temperatures of the year.
By the middle of the month, the situation became milder and wetter. March was exceptionally wet for many regions except for northern Scotland. It was the sixth-wettest March for the UK, third-wettest for England and Northern Ireland and fifth-wettest for Wales.
April saw temperature and rainfall statistics near-average, although Storm Noa was one of the most significant April storms since 2013, with hundreds of homes across south-west England and Wales left without power.
A maximum wind gust of 83 Kt (96mph) at Needles on the Isle of Wight was the highest wind gust on record for England during the month of April. This particular site is located at the top of a cliff exposed to westerly winds so is representative of a very exposed coastal location. Inland winds were lower, but still sufficient to cause some disruption.
May was warmer and drier overall, although heavy thunderstorms over 7-11 May caused surface-water flooding across parts of southern and eastern England. Drier weather from the middle of the month, however, resulted in a shift to wildfire reports across parts of Wales, the south-west and west Yorkshire by the end of the month.
Summer
It was the warmest June on record for the UK with an average temperature of 15.8C, beating the previous record of 14.9C that was set in the Junes of 1940 and 1976 by 0.9C. Previously, the top three warmest Junes were separated by just 0.1C.
The highest daily temperature reached in the month was 32.2C (on 10 and 25 June), which did not challenge the June temperature record of 35.6C, recorded on 28 June 1976. What was unusual about June 2023 was the persistence of the warmth rather than its severity. Temperatures exceeded 25C for at least a fortnight with peaks in excess of 30C.
A long-standing curious statistical quirk of UK climatology was that 13 June was the only June date that had never previously recorded temperatures in excess of 30C in meteorological records spanning over 100 years. This quirky fact was finally broken this year, reaching 30.8C on 13 June.
The chart below shows a comparison of the 2023 June heatwave with 1976, the previous joint record warmest June. This shows the UK-average daily maximum temperature through June and July for 1976 (dotted line and grey shading) and 2023 (blue line and orange shading).
The 1976 heatwave was certainly more severe than 2023, but occurred slightly later in the season, peaking in early July. In contrast, the persistent warmth in 2023 fell within the calendar month of June.
A significant contributing factor to the exceptional and persistent warmth was a major North Atlantic marine heatwave, which brought record-breaking temperatures in the North Atlantic and around the UK. A severe marine heatwave was declared in mid-June, which further amplified temperatures over the UK land.
An attribution study by the Met Office found that the likelihood of beating the UK land June temperature record had at least doubled compared to when it was first set in 1940. We estimated there was around a 3% chance of beating the record in a 1991-2020 climate and, by the 2050s, a record could be occurring around every other year on average under a high-emissions scenario.
Unsurprisingly, the June warmth was associated with a persistent high-pressure system resulting in plenty of clear skies and dry conditions. The month was, therefore, also the fourth sunniest June on record, and the sunniest June since 1957, but not as sunny as the exceptionally sunny month of May 2020.
Some more unsettled weather at the end of the month meant that while recording only around 68% of average rainfall, June was not dry enough to trouble any records.
A more unsettled situation then took over for the remainder of the summer, with conditions turning cooler, duller and windier.
It was the sixth-wettest July on record with 140.1mm and the wettest since 2009 (145.5mm). It was the wettest July on record for Northern Ireland and for parts of north-west England including Merseyside, Lancashire and Greater Manchester.
August continued the unsettled theme with a distinct lack of summery weather – however, it was not as wet as July.
A key driver of the wet high summer was a displacement in the jet stream to a more southerly track across the UK. The map below shows anomalies in wind speed at 250hPa, relative to a 1991-2020 average. (250hPa is a level of equal pressure and is equivalent to a height of around 10.5km.)
The purple regions show where the wind is stronger than average and orange they are weaker – highlighting a strengthening of the upper-level wind across southern England and a weakening in the more typical summer jet stream to the north of Scotland. This resulted in low-pressure weather systems from the Atlantic being directed on a more southerly track over the UK.
Despite being relatively wet during the high summer (July through August), the average temperature averaged across July (14.9C) and August (15.3C) was 15.1C. This was cooler than June (15.8C), but close to the 1991-2020 average for Jul-Aug (15.2C).
Another indicator of the influence of climate change on UK climate is that a wet summer such as that of 2023 is approximately 1C warmer than equivalently wet summers from the past.
Autumn (and December)
In early September, the jet stream shifted north and high pressure returned. Consequently, the UK experienced another heatwave bringing some of the hottest weather of the year, peaking at 33.5C at Faversham, Kent on 10 September.
A new high-temperature record was also set for the month for Northern Ireland with 28C at Castlederg, County Tyrone on the 8 September.
It was the longest run of days reaching 30C somewhere in the country during September on record at seven consecutive days (4-10 September). It is only the fourth time on record that the highest temperature of the year has occurred in September, with the other years being 2016, 1954, 1949 and 1919. High temperatures were not confined to the daytime and some locations also recorded “tropical nights” when the minimum temperatures do not drop below 20C.
The month concluded with Storm Agnes kicking off the 2023-24 storm season. But the early warmth contributed to it becoming the joint-warmest September on record for the UK (with 2006). An average temperature of 15.2C was warmer than July and only marginally behind August.
A rapid attribution conducted at the time showed that a September this warm would be exceptionally unlikely in a natural climate, but in our current climate there is approximately a 3% chance of reaching or exceeding it. A September this warm does still require the right combination of factors, but climate change is making such late-season warmth more likely.
The remainder of the autumn season and December continued the generally mild, wet and – at times – stormy theme, with the joint-sixth wettest October and joint-eighth wettest December on record. It was the sixth-warmest autumn for the UK and third-warmest for both England and Wales.
Reviewing 2023 demonstrates how the UK is subject to the combined influences of the variability in the weather, but also the influence of human-caused climate change. This is affecting both our climate statistics and also the likelihood of some types of extreme events.
The post Met Office: A review of the UK’s climate in 2023 appeared first on Carbon Brief.
The head of the United Nations body governing the global shipping industry has said that greenhouse gases from the global shipping industry will fall, whether or not the sector’s “Net Zero Framework” to cut emissions is adopted in October.
Arsenio Dominguez, secretary-general of the International Maritime Organization, told a new year’s press conference in London on Friday that, even if governments don’t sign up to the framework later this year as planned, the clean-up of the industry responsible for 3% of global emissions will continue.
“I reiterate my call to industry that the decarbonisation has started. There’s lots of research and development that is ongoing. There’s new plans on alternative fuels like methanol and ammonia that continue to evolve,” he told journalists.
He said he has not heard any government dispute a set of decarbonisation goals agreed in 2023. These include targets to reduce emissions 20-30% on 2008 levels by 2030 and then to reach net zero emissions “by or around, i.e. close to 2050”.
-
US-led alliance wins a year’s delay in adoption of green shipping deal
The IMO’s Net-Zero Framework will be up for approval again in October 2026, after the US and Saudi Arabia persuaded countries not to vote on it as planned -
Big fishing nations secure last-minute seat to write rules on deep sea conservation
A treaty to protect the high seas entered into force this week with the backing of over 80 countries including late ratifications by Japan, China and Brazil
Dominguez said the 2030 emissions reduction target could be reached, although a goal for shipping to use at least 5% clean fuels by 2030 would be difficult to meet because their cost will remain high until at least the 2030s. The goals agreed in 2023 also included cutting emissions by 70-80% by 2040.
In October 2025, a decision on a proposed framework of practical measures to achieve the goals, which aims to incentivise shipowners to go green by taxing polluting ships and subsidising cleaner ones, was postponed by a year after a narrow vote by governments.
Ahead of that vote, the US threatened governments and their officials with sanctions, tariffs and visa restrictions – and President Donald Trump called the framework a “Green New Scam Tax on Shipping”.
Dominguez said at Friday’s press conference that he had not received any official complaints about the US’s behaviour at last October’s meeting but – without naming names – he called on nations to be “more respectful” at the IMO. He added that he did not think the US would leave the IMO, saying Washington had engaged constructively on the organisation’s budget and plans.
EU urged to clarify ETS position
The European Union – along with Brazil and Pacific island nations – pushed hard for the framework to be adopted in October. Some developing countries were concerned that the EU would retain its charges for polluting ships under its emissions trading scheme (ETS), even if the Net Zero Framework was passed, leading to ships travelling to and from the EU being charged twice.
This was an uncertainty that the US and Saudi Arabia exploited at the meeting to try and win over wavering developing countries. Most African, Asian and Caribbean nations voted for a delay.
On Friday, Dominguez called on the EU “to clarify their position on the review of the ETS, in order that as we move forward, we actually don’t have two systems that are going to be basically looking for the same the same goal, the same objective.”
He said he would continue to speak to EU member states, “to maintain the conversations in here, rather than move forward into fragmentation, because that will have a very detrimental effect in shipping”. “That would really create difficulties for operators, that would increase the cost, and everybody’s going to suffer from it,” he added.
The IMO’s marine environment protection committee, in which governments discuss climate strategy, will meet in April although the Net Zero Framework is not scheduled to be officially discussed until October.
The post IMO head: Shipping decarbonisation “has started” despite green deal delay appeared first on Climate Home News.
IMO head: Shipping decarbonisation “has started” despite green deal delay
Climate Change
DeBriefed 23 January 2026: Trump’s Davos tirade; EU wind and solar milestone; High seas hope
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Trump vs world
TILTING AT ‘WINDMILLS’: At the World Economic Forum meeting in Davos, Switzerland, Donald Trump was quoted by Reuters as saying – falsely – that China makes almost all of the world’s “windmills”, but he had not “been able to find any windfarms in China”, calling China’s buyers “stupid”. The newswire added that China “defended its wind power development” at Davos, with spokesperson Guo Jiakun saying the country’s efforts to tackle climate change and promote renewable energy in the world are “obvious to all”.
SPEECH FACTCHECKED: The Guardian factchecked Trump’s speech, noting China has more wind capacity than any other country, with 40% of global wind generation in 2024 in China. See Carbon Brief’s chart on this topic, posted on BlueSky by Dr Simon Evans.
GREENLAND GRAB: Trump “abruptly stepped back” from threats to seize Greenland with the use of force or leveraging tariffs, downplaying the dispute as a “small ask” for a “piece of ice”, reported Reuters. The Washington Post noted that, while Trump calls climate change “a hoax”, Greenland’s described value is partly due to Arctic environmental shifts opening up new sea routes. French president Macron slammed the White House’s “new colonial approach”, emphasising that climate and energy security remain European “top priorities”, according to BusinessGreen.
Around the world
- EU MILESTONE: For the first time, wind and solar generated more electricity than fossil fuels in the EU last year, reported Reuters. Wind and solar generated 30% of the EU’s electricity in 2025, just above 29% from plants running on coal, gas and oil, according to data from the thinktank Ember covered by the newswire.
- WARM HOMES: The UK government announced a £15bn plan for rolling out low-carbon technology in homes, such as rooftop solar and heat pumps. Carbon Brief’s newly published analysis has all the details.
- BIG THAW: Braving weather delays that nearly “derail[ed] their mission”, scientists finally set up camp on Antarctica’s thawing Thwaites glacier, reported the New York Times. Over the next few weeks, they will deploy equipment to understand “how this gargantuan glacier is being corroded” by warming ocean waters.
- EVS WELCOME: Germany re-introduced electric vehicle subsidies, open to all manufacturers, including those in China, reported the Financial Times. Tesla and Volvo could be the first to benefit from Canada’s “move to slash import tariffs on made-in-China” EVs, said Bloomberg.
- SOUTHERN AFRICA FLOODS: The death toll from floods in Mozambique went up to 112, reported the African Press Agency on Thursday. Officials cited the “scale of rainfall” – 250mm in 24 hours – as a key driver, it added. Frontline quoted South African president Cyril Ramaphosa, who linked the crisis to climate change.
$307bn
The amount of drought-related damages worldwide per year – intensified by land degradation, groundwater depletion and climate change – according to a new UN “water bankruptcy” report.
Latest climate research
- A researcher examined whether the “ultra rich” could and should pay for climate finance | Climatic Change
- Global deforestation-driven surface warming increased by the “size of Spain” between 1988 and 2016 | One Earth
- Increasing per-capita meat consumption by just one kilogram a year is “linked” to a nearly 2% increase in embedded deforestation elsewhere | Environmental Research Letters
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
For the first time since monitoring began 15 years ago, there were more UK newspaper editorials published in 2025 opposing climate action than those supporting it, Carbon Brief analysis found. The chart shows the number of editorials arguing for more (blue) and less (red) climate action between 2011-2025. Editorials that took a “balanced” view are not represented in the chart. All 98 editorials opposing climate action were in right-leaning outlets, while nearly all 46 in support were in left-leaning and centrist publications. The trend reveals the scale of the net-zero backlash in the UK’s right-leaning press, highlighting the rapid shift away from a political consensus.
Spotlight
Do the oceans hold hope for international law?
This week, Carbon Brief unpacks what a landmark oceans treaty “entering into force” means and, at a time of backtracking and breach, speaks to experts on the future of international law.
As the world tries to digest the US retreat from international environmental law, historic new protections for the ocean were quietly passed without the US on Saturday.
With little fanfare besides a video message from UN chief Antonio Guterres, a binding UN treaty to protect biodiversity in two-thirds of the Earth’s oceans “entered into force”.
What does the treaty mean and do?
The High Seas Treaty – formally known as the “biodiversity beyond national jurisdiction”, or “BBNJ” agreement – obliges countries to act in the “common heritage of humankind”, setting aside self-interest to protect biodiversity in international waters. (See Carbon Brief’s in-depth explainer on what the treaty means for climate change).
Agreed in 2023, it requires states to undertake rigorous impact assessments to rein in pollution and share benefits from marine genetic resources with coastal communities and countries. States can also propose marine protected areas to help the ocean – and life within it – become more resilient to “stressors”, such as climate change and ocean acidification.
“It’s a beacon of hope in a very dark place,” Dr Siva Thambisetty, an intellectual property expert at the London School of Economics and an adviser to developing countries at UN environmental negotiations, told Carbon Brief.
Who has signed the agreement?
Buoyed by a wave of commitments at last year’s UN Oceans conference in France, the High Seas treaty has been signed by 145 states, with 84 nations ratifying it into domestic law.
“The speed at which [BBNJ] went from treaty adoption to entering into force is remarkable for an agreement of its scope and impact,” said Nichola Clark, from the NGO Pew Trusts, when ratification crossed the 60-country threshold for it to enter into force last September.
For a legally binding treaty, two years to enter into force is quick. The 1997 Kyoto Protocol – which the US rejected in 2001 – took eight years.
While many operative parts of the BBNJ underline respect for “national sovereignty”, experts say it applies to an area outside national borders, giving territorial states a reason to get on board, even if it has implications for the rest of the oceans.
What is US involvement with the treaty?
The US is not a party to the BBNJ’s parent Law of the Sea, or a member of the International Seabed Authority (ISA) overseeing deep-sea mining.
This has meant that it cannot bid for permits to scour the ocean floor for critical minerals. China and Russia still lead the world in the number of deep-sea exploration contracts. (See Carbon Brief’s explainer on deep-sea mining).
In April 2025, the Biden administration issued an executive order to “unleash America’s offshore critical minerals and resources”, drawing a warning from the ISA.
This Tuesday, the Trump administration published a new rule to “fast-track deep-sea mining” outside its territorial waters without “environmental oversight”, reported Agence France-Presse.
Prof Lavanya Rajamani, an expert in international environmental law at the University of Oxford, told Carbon Brief that, while dealing with US unilateralism and “self-interest” is not new to the environmental movement, the way “in which they’re pursuing that self-interest – this time on their own, without any legal justification” has changed. She continued:
“We have to see this not as a remaking of international law, but as a flagrant breach of international law.”
While this is a “testing moment”, Rajamani believes that other states contending with a “powerful, idiosyncratic and unpredictable actor” are not “giving up on decades of multilateralism…they just asking how they might address this moment without fundamentally destabilising” the international legal order.
What next for the treaty?
Last Friday, China announced its bid to host the BBNJ treaty’s secretariat in Xiamen – “a coastal hub that sits on the Taiwan Strait”, reported the South China Morning Post.
China and Brussels currently vie as the strongest contenders for the seat of global ocean governance, given that Chile made its hosting offer days before the country elected a far-right president.
To Thambisetty, preparatory BBNJ meetings in March can serve as an important “pocket of sanity” in a turbulent world. She concluded:
“The rest of us have to find a way to navigate the international order. We have to work towards better times.”
Watch, read, listen
OWN GOAL: For Backchannel, Zimbabwean climate campaigner Trust Chikodzo called for Total Energies to end its “image laundering” at the Africa Cup of Nations.
MATERIAL WORLD: In a book review for the Baffler, Thea Riofrancos followed the “unexpected genealogy” of the “energy transition” outlined in Jean-Baptiste Fressoz’s More and More and More: An All-Consuming History.
REALTY BITES: Inside Climate News profiled Californian climate policy expert Neil Matouka, who built a plugin to display climate risk data that real-estate site Zillow removed from home listings.
Coming up
- 26 January: International day of clean energy
- 27 January: India-EU summit, New Delhi
- 31 January: Submit inputs on food systems and climate change for a report by the UN special rapporteur on climate change
- 1 February: Costa Rica elections
Pick of the jobs
- British Antarctic Survey, boating officer | Salary: £31,183. Location: UK and Antarctica
- National Centre for Climate Research at the Danish Meteorological Institute, climate science leader | Salary: NA. Location: Copenhagen, with possible travel to Skrydstrup, Karup and Nuuk
- Mongabay, journalism fellows | Stipend: $500 per month for 6 months. Location: Remote
- Climate Change Committee, carbon budgets analyst | Salary: £47,007-£51,642. Location: London
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
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The post DeBriefed 23 January 2026: Trump’s Davos tirade; EU wind and solar milestone; High seas hope appeared first on Carbon Brief.
DeBriefed 23 January 2026: Trump’s Davos tirade; EU wind and solar milestone; High seas hope
The UK government has released its long-awaited “warm homes plan”, detailing support to help people install electric heat pumps, rooftop solar panels and insulation in their homes.
It says up to 5m households could benefit from £15bn of grants and loans earmarked by the government for these upgrades by 2030.
Electrified heating and energy-efficient homes are vital for the UK’s net-zero goals, but the plan also stresses that these measures will cut people’s bills by “hundreds of pounds” a year.
The plan shifts efforts to tackle fuel poverty away from a “fabric-first” approach that starts with insulation, towards the use of electric technologies to lower bills and emissions.
Much of the funding will support people buying heat pumps, but the government has still significantly scaled back its expectations for heat-pump installations in the coming years.
Beyond new funding, there are also new efficiency standards for landlords that could result in nearly 3m rental properties being upgraded over the next four years.
In addition, the government has set out its ambition for scaling up “heat networks”, where many homes and offices are served by communal heating systems.
Carbon Brief has identified the key policies laid out in the warm homes plan, as well as what they mean for the UK’s climate targets and energy bills.
- Why do homes matter for UK climate goals?
- What is the warm homes plan?
- What is included in the warm homes plan?
- What does the warm homes plan mean for energy bills?
- What has been the reaction to the plan?
Why do homes matter for UK climate goals?
Buildings are the second-largest source of emissions in the UK, after transport. This is largely due to the gas boilers that keep around 85% of UK homes warm.
Residential buildings produced 52.8m tonnes of carbon dioxide equivalent (MtCO2e) in 2024, around 14% of the nation’s total, according to the latest government figures.
Fossil-fuel heating is by far the largest contributor to building emissions. There are roughly 24m gas boilers and 1.4m oil boilers on the island of Great Britain, according to the National Energy System Operator (NESO).
This has left the UK particularly exposed – along with its gas-reliant power system – to the impact of the global energy crisis, which caused gas prices – and energy bills – to soar.
At the same time, the UK’s old housing stock is often described as among the least energy efficient in Europe. A third of UK households live in “poorly insulated homes” and cannot afford to make improvements, according to University College London research.
This situation leads to more energy being wasted, meaning higher bills and more emissions.
Given their contribution to UK emissions, buildings are “expected to be central” in the nation’s near-term climate goals, delivering 20% of the cuts required to achieve the UK’s 2030 target, according to government adviser the Climate Change Committee (CCC).
(Residential buildings account for roughly 70% of the emissions in the buildings sector, with the rest coming from commercial and public-sector buildings.)
Over recent years, Conservative and Labour governments have announced various measures to cut emissions from homes, including schemes to support people buying electric heat pumps and retrofitting their homes.
However, implementation has been slow. While heat-pump installations have increased, they are not on track to meet the target set by the previous government of 600,000 a year by 2028.
Meanwhile, successive schemes to help households install loft and wall insulation have been launched and then abandoned, meaning installation rates have been slow.
At the same time, the main government-backed scheme designed to lift homes out of fuel poverty, the “energy company obligation” (ECO), has been mired in controversy over low standards, botched installations and – according to a parliamentary inquiry – even fraud.
(The government announced at the latest budget that it was scrapping ECO.)
The CCC noted in its most recent progress report to parliament that “falling behind on buildings decarbonisation will have severe implications for longer-term decarbonisation”.
What is the warm homes plan?
The warm homes plan was part of the Labour party’s election-winning manifesto in 2024, sold at the time as a way to “cut bills for families” through insulation, solar and heat pumps, while creating “tens of thousands of good jobs” and lifting “millions out of fuel poverty”.
It replaces ECO, introduces new support for clean technologies and wraps together various other ongoing policies, such as the “boiler upgrade scheme” (BUS) grants for heat pumps.
The warm homes plan was officially announced by the government in November 2024, stating that up to 300,000 households would benefit from home upgrades in the coming year. However, the plan itself was repeatedly delayed.
In the spending review in June 2025, the government confirmed the £13.2bn in funding for the scheme pledged in the Labour manifesto, covering spending between 2025-26 and 2029-30.
The government said this investment would help cut bills by up to £600 per household through efficiency measures and clean technologies such as heat pumps, solar panels and batteries.
After scrapping ECO at the 2025 budget, the treasury earmarked an extra £1.5bn of funding for the warm homes plan over five years. This is less than the £1bn annual budget for ECO, which was funded via energy bills, but is expected to have lower administrative overheads.
In the foreword to the new plan, secretary of state Ed Miliband says that it will deliver the “biggest public investment in home upgrades in British history”. He adds:
“The warm homes plan [will]…cut bills, tackle fuel poverty, create good jobs and get us off the rollercoaster of international fossil fuel markets.”
Miliband argues in his foreword that the plan will “spread the benefits” of technologies such as solar to households that would otherwise be unable to afford them. He writes: “This historic investment will help millions seize the benefits of electrification.” Miliband concludes:
“This is a landmark plan to make the British people better off, secure our energy independence and tackle the climate crisis.”
What is included in the warm homes plan?
The warm homes plan sets out £15bn of investment over the course of the current parliament to drive uptake of low-carbon technologies and upgrade “up to” 5m homes.
A key focus of the plan is energy security and cost savings for UK households.
The government says its plan will “prioritise” investment in electrification measures, such as heat pumps, solar panels and battery storage. This is where most of the funding is targeted.
However, it also includes new energy-efficiency standards to encourage landlords to improve conditions for renters.
Some policies were notable due to their absence, such as the lack of a target to end gas boiler sales. The plan also states that, while it will consult on the use of hydrogen in heating homes, this is “not yet a proven technology” and therefore any future role would be “limited”.
New funding
Technologies such as heat pumps and rooftop solar panels are essential for the UK to achieve its net-zero goals, but they carry significant up-front costs for households. Plans for expanding their uptake therefore rely on government support.
Following the end of ECO in March, the warm homes plan will help fill the gap in funding for energy-efficiency measures that it is expected to leave.
As the chart below shows, a range of new measures under the warm homes plan – including a mix of grants and loans – as well as more funding for existing schemes, leads to an increase in support out to 2030.
One third of the total funding – £5bn in total – is aimed at low-income households, including social housing tenants. This money will be delivered in the form of grants that could cover the full cost of upgrades.
The plan highlights solar panels, batteries and “cost-effective insulation” for the least energy-efficient homes as priority measures for this funding, with a view to lowering bills.
There is also £2.7bn for the existing boiler upgrade scheme, which will see its annual allocation increase gradually from £295m in 2025-26 to £709m in 2029-30.
This is the government’s measure to encourage better-off “able to pay” households to buy heat pumps, with grants of £7,500 towards the cost of replacing a gas or oil-fired boiler. For the first time, there will also be new £2,500 grants from the scheme for air-to-air heat pumps (See: Heat pumps.)
A key new measure in the plan is £2bn for low- and zero-interest consumer loans, to help with the cost of various home upgrades, including solar panels, batteries and heat pumps.
Previous efforts to support home upgrades with loans have not been successful. However, innovation agency Nesta says the government’s new scheme could play a central role, with the potential for households buying heat pumps to save hundreds of pounds a year, compared to purchases made using regular loans.
The remaining funding over the next four years includes money assigned to heat networks and devolved administrations in Scotland, Wales and Northern Ireland, which are responsible for their own plans to tackle fuel poverty and household emissions.
Heat pumps
Heat pumps are described in the plan as the “best and cheapest form of electrified heating for the majority of our homes”.
The government’s goal is for heat pumps to “increasingly become the desirable and natural choice” for those replacing old boilers. At the same time, it says that new home standards will ensure that new-build homes have low-carbon heating systems installed by default.
Despite this, the warm homes plan scales back the previous government’s target for heat-pump installations in the coming years, reflecting the relatively slow increase in heat-pump sales. It also does not include a set date to end the sale of gas boilers.
The plan’s central target is for 450,000 heat pumps to be installed annually by 2030, including 200,000 in new-build homes and 250,000 in existing homes.
This is significantly lower than the previous target – originally set in 2021 under Boris Johnson’s Conservative government – to install 600,000 heat pumps annually by 2028.
Meeting that target would have meant installations increasing seven-fold in just four years, between 2024 and 2028. Now, installations only need to increase five-fold in six years.
As the chart below shows, the new target is also considerably lower than the heat-pump installation rate set out in the CCC’s central net-zero pathway. That involved 450,000 installations in existing homes alone by 2030 – excluding new-build properties.
Some experts and campaigners questioned how the UK would remain on track for its legally binding climate goals given this scaled-back rate of heat-pump installations.
Additionally, Adam Bell, policy director at the thinktank Stonehaven, writes on LinkedIn that the “headline numbers for heat pump installs do not stack up”.
Heat pumps in existing homes are set to be supported primarily via the boiler upgrade scheme and – according to Bell – there is not enough funding for the 250,000 installations that are planned, despite an increased budget.
The government’s plan relies in part on the up-front costs of heat pump installation “fall[ing] significantly”. According to Bell, it may be that the government will reduce the size of boiler upgrade scheme grants in the future, hoping that costs will fall sufficiently.
Alternatively, the government may rely on driving uptake through its planned low-cost loans and the clean heat market mechanism, which requires heating-system suppliers to sell a growing share of heat pumps.
Rooftop solar
Rooftop solar panels are highlighted in the plan as “central to cutting energy bills”, by allowing households to generate their own electricity to power their homes and sell it back to the grid.
At the same time, rooftop solar is expected to make a “significant contribution” to the government’s target of hitting 45-47 gigawatts (GW) of solar capacity by 2030.
As it stands, there is roughly 5.2GW of solar capacity on residential rooftops.
Taken together, the government says the grants and loans set out in the warm homes plan could triple the number of homes with rooftop solar from 1.6m to 4.6m by 2030.
It says that this is “in addition” to homes that decide to install rooftop solar independently.
Efficiency standards
The warm homes plan says that the government will publish its “future homes standard” for new-build properties, alongside necessary regulations, in the first quarter of 2026.
On the same day, the government also published its intention to reform “energy performance certificates” (EPCs), the ratings that are supposed to inform prospective buyers and renters about how much their new homes will cost to keep warm.
The current approach to measuring performance for EPCs is “unreliable” and thought to inadvertently discourage heat pumps. It has faced long-standing calls for reform.
As well as funding low-carbon technologies, the warm homes plan says it is “standing up for renters” with new energy-efficiency standards for privately and socially rented homes.
Currently, private renters – who rely on landlords to invest in home improvements – are the most likely to experience fuel poverty and to live in cold, damp homes.
Landlords will now need to upgrade their properties to meet EPC ratings B and C across two new-style EPC metrics by October 2030. There are “reasonable exemptions” to this rule that will limit the amount landlords have to spend per property to £10,000.
In total, the government expects “up to” 1.6m homes in the private-rental sector to benefit from these improvements and “up to” 1.3m social-rent homes.
These new efficiency standards therefore cover three-fifths of the “up to” 5m homes helped by the plan.
The government also published a separate fuel poverty strategy for England.
Heat networks
The warm homes plan sets out a new target to more than double the amount of heating provided using low-carbon heat networks – up to 7% of England’s heating demand by 2035 and a fifth by 2050.
This involves an injection of £1.1bn for heat networks, including £195m per year out to 2030 via the green heat network fund, as well as “mobilising” the National Wealth Fund.
The plan explains that this will primarily benefit urban centres, noting that heat networks are “well suited” to serving large, multi-occupancy buildings and those with limited space.
Alongside the plan, the government published a series of technical standards for heat networks, including for consumer protection.
What does the warm homes plan mean for energy bills?
The warm homes plan could save households “hundreds on energy bills” for those whose homes are upgraded, according to the UK government.
This is in addition to two changes announced in the budget in 2025, which are expected to cut energy bills for all homes by an average of £150 a year.
This included the decisions to bring ECO to an end when the current programme of work wraps up at the end of the financial year and for the treasury to cover three-quarters of the cost of the “renewables obligation” (RO) for three years from April 2026.
Beyond this, households that take advantage of the measures outlined in the plan can expect their energy bills to fall by varying amounts, the government says.
The warm homes plan includes a number of case studies that detail how upgrades could impact energy bills for a range of households. For example, it notes that a social-rented two-bedroom semi-detached home that got insulation and solar panels could save £350 annually.
An owner-occupier three-bedroom home could save £450 annually if it gets solar panels and a battery through consumer loans offered under the warm homes plan, it adds.
Similar analysis published by Nesta says that a typical household that invests in home upgrades under the plan could save £1,000 a year on its energy bill.
It finds that a household with a heat pump, solar panels and a battery, which uses a solar and “time of use tariff”, could see its annual energy bill fall by as much as £1,000 compared with continuing to use a gas boiler, from around £1,670 per year to £670, as shown in the chart below.
Ahead of the plan being published, there were rumours of further “rebalancing” energy bills to bring down the cost of electricity relative to gas. However, this idea failed to come to fruition in the warm homes plan.
This would have involved reducing or removing some or all of the policy costs currently funded via electricity bills, by shifting them onto gas bills or into general taxation.
This would have made it relatively cheaper to use electric technologies such as heat pumps, acting as a further incentive to adopt them.
Nesta highlights that in the absence of further action with regard to policy costs, the electricity-to-gas price ratio is likely to stay at around 4.1 from April 2026.
What has been the reaction to the plan?
Many of the commitments in the warm homes plan were welcomed by a broad range of energy industry experts, union representatives and thinktanks.
Greg Jackson, the founder of Octopus Energy, described it as a “really important step forward”, adding:
“Electrifying homes is the best way to cut bills for good and escape the yoyo of fossil fuel costs.”
Dhara Vyas, chief executive of the trade body Energy UK, said the government’s commitment to spend £15bn on upgrading home heating was “substantial” and would “provide certainty to investors and businesses in the energy market”.
On LinkedIn, Camilla Born, head of the campaign group Electrify Britain, said the plan was a “good step towards backing electrification as the future of Britain, but it must go hand in hand with bringing down the costs of electricity”.
However, right-leaning publications and politicians were critical of the plan, focusing on how a proportion of solar panels sold in the UK are manufactured in China.
According to BBC News, two-thirds (68%) of the solar panels imported to the UK came from China in 2024.
In an analysis of the plan, the Guardian’s environment editor Fiona Harvey and energy correspondent Jillian Ambrose argued that the strategy is “all carrot and no stick”, given that the “longstanding proposal” to ban the installation of gas boilers beyond 2035 has been “quietly dropped”.
Christopher Hammond, chief executive of UK100, a cross-party network of more than 120 local authorities, welcomed the plan, but urged the government to extend it to include public buildings.
The government’s £3.5bn public sector decarbonisation scheme, which aimed to electrify schools, hospitals and council buildings, ended in June 2025 and no replacement has been announced, according to the network.
The post Q&A: What UK’s ‘warm homes plan’ means for climate change and energy bills appeared first on Carbon Brief.
Q&A: What UK’s ‘warm homes plan’ means for climate change and energy bills
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