English schools could exceed an “overheating” threshold of 26C for one-third of the academic year if global warming reaches 2C above pre-industrial temperatures, a new study finds.
The study, published in Climate Risk Management, assesses the risk of overheating in around 20,000 schools across England, using data on the schools’ location, the type of building and the climate.
The authors identify the indoor temperature of 26C as the upper “comfortable” limit in classrooms. While the average school would be expected to surpass this limit for more than one-third of the academic year under 2C of warming, it rises to half of the year for 4C of warming.
The authors also investigate a 35C threshold, above which “important health impacts” are seen. They find that, currently, schools only exceed this temperature threshold once every year, on average.
However, under 4C warming, the average school is expected to exceed this threshold around nine times per year, accounting for 5% of the academic year.
Newer schools are more likely to overheat than their older counterparts, the authors say, because they typically have better insulation and lower ceilings. They add that schools in the south and east of England, as well as London, are at greatest risk of overheating.
The study shows the need for adaptation measures such as improved ventilation, a scientist not involved in the study tells Carbon Brief. She adds that “school buildings need to be designed today with tomorrow’s climate in mind”.
Overheating schools
Over the past month, millions of children in the Philippines, Bangladesh and India stayed home as a record-breaking heatwave forced schools across southern Asia to shut.
However, schools in more temperate climates can also be affected by the heat. In July 2022, the UK experienced a record-breaking heatwave that saw temperatures exceed 40C for the first time on record. During this period, the UK put out its first red heat alert and many schools finished early or closed their doors entirely for the safety of their staff and students.
Extreme heat can be deadly. During a heatwave, the number of “heat-related deaths” – where exposure to heat either causes or significantly contributes to a death – tends to increase.
Children are particularly vulnerable to high temperatures. When it is hot, the human body produces sweat to cool itself down. However, children do not sweat as much as adults and are therefore less able to regulate their body temperature.
Even when temperatures do not reach headline-grabbing highs, any increase above the “optimal” temperature can be harmful. A recent World Bank report estimates that in “middle and high-income settings”, the ideal classroom temperature lies between 19.5C and 23.3C. The report says:
“In those settings, any temperature above 24C can compromise reaction time, processing speed and accuracy through changes in heart rate and respiratory rates…
“Across five experimental studies, high temperature produced declines in student performance ranging from 2 to 12% for each 1C increase in classroom temperature.”
Furthermore, when teachers work in classrooms that are too hot, they can become fatigued or lose concentration, making them more likely to put themselves and the children in their care at risk.
UK guidance suggests a minimum working temperature of 16C, if employees are not carrying out physical work. However, there are no legal maximum working temperatures for schools in the UK.
“Our children spend 30% of their lives in schools,” says Prof Lucelia Rodrigues – chair of sustainable and resilient cities at the University of Nottingham. Rodrigues, who was not involved in the study, tells Carbon Brief that it is “imperative that we provide them with comfortable, healthy environments to thrive and achieve their best”.
Newer buildings
The new study assesses how often English schools overheat, which schools are most at risk and how climate change could exacerbate the problem. The study authors define two temperature thresholds:
- 26C: The “upper limit of comfortable operative temperature in schools”.
- 35C: The temperature at which “important health impacts” are seen.
The authors use the open-access CLIMADA platform to simulate the risk of English schools overheating, combining information on hazard, exposure and vulnerability.
The authors use climate data from the UK Climate Projections 2018 (UKCP18) to determine annual variations in temperature across England over 1998-2017. They then model those temperatures in worlds with average global temperatures of 2C and 4C above pre-industrial levels. This provides the hazard data.
They then quantify exposure using data on the location of around 20,000 primary and secondary state schools in England. And vulnerability is assessed using “physics-based building models” to quantify the link between outdoor and indoor temperature for different types of buildings.
The plot below shows an example of the relationship between outdoor daily average temperature (blue) and indoors daily maximum temperature (red) in two different schools. The dashed and dotted lines indicate the 26C and 35C temperature thresholds, respectively.
The authors find that schools built before 1918 are generally most able to keep cool, while those built after 1967 overheat the most easily.
Dr Laura Dawkins – an “expert scientist” in climate risk and resilience at the UK Met Office, and lead author of the study – tells Carbon Brief that this is due to “differences in typical floor-to-ceiling heights”. Newer schools are typically built with lower ceilings, which cause the room to heat up more quickly, she explains.
Rodrigues adds that newer schools are built to “more stringent building regulations designed to reduce heating energy demand”, making them more airtight and well-insulated. Citing her 2010 study, she continues:
“In classrooms within schools built post-2010, overheating occurred for more than 40% of school hours, whilst in older schools with leakier and non-insulated envelopes overheating was rarely reported.”
Rodrigues says that ventilation is key, noting that it not only prevents buildings from overheating, but can also “improve air quality, which will have a significant impact on productivity” in pupils.
Mapping heat
The study’s findings include a series of maps to show where the most at-risk schools are located.
The maps below show the expected total number of days in an academic year that each school will cross the 26C (left) and 35C (right) temperature thresholds. The top row uses the climate of 1998-2017, the middle row a 2C-warmer world and the bottom row a 4C-warmer world. Darker red indicates more overheating days.
The authors assume 195 days in a school year, to account for weekends and holidays. The analysis does not include August – the hottest part of the year – because schools are typically closed for the summer holidays during this time.
The authors find that schools in south and east of England, as well as London, are at greatest risk of overheating. They add that this is largely due to the urban heat island effect – in which a combination of factors, such as buildings, reduced vegetation and high domestic energy use, cause urban areas to become hotter than more rural regions.
By combining the data from all 20,000 schools, the authors determine how many days the average school is expected to cross the 26C and 35C warming thresholds under different global warming levels. The authors also calculate values for “at-risk” schools – which rank in the highest 10% on their risk metric.
These results are shown in the table below.
| 26C threshold, average school | 26C threshold, at-risk school | 35C threshold, average school | 35C threshold, at-risk school | |
|---|---|---|---|---|
| Recent climate | 59 | 59 | 1 | 1 |
| 2C warming | 71 | 75 | 3 | 5 |
| 4C warming | 89 | 92 | 9 | 13 |
Number days during the academic year that “average” and “at-risk” schools are expected to cross the 26C and 35C warming thresholds under different global warming levels. Adapted from Dawkins et al (2024).
The average school currently exceeds the 26C threshold for 59 days – accounting for around one-third of the academic year – according to the study. However, the authors warn that this could rise to 71 and 89 days under the 2C and 4C scenarios, respectively.
Meanwhile, England’s most at-risk schools currently face one day per year of indoor temperatures above 35C. This could rise to five days per year under a 2C warming scenario, and 13 under a 4C scenario.
This study is “a first attempt at applying the novel spatial risk assessment framework to this real world problem”, according to Dr Dan Bernie climate resilience science manager and health science lead at the UK Met Office and an author on the study.
Bernie tells Carbon Brief that he is currently working on “generating more robust results using individual school building models and higher resolution climate projections”.
Prof David Bresch is a professor at the department of environmental systems science at ETH Zurich and is the founder and senior scientific advisor at CLIMADA. He tells Carbon Brief that the authors have used the platform well, providing a good “prototype” for this type of study.
The biggest “challenge” in the study is the team’s use of fixed temperature thresholds, he says. However, he calls the paper an “important contribution” to the literature, and says that it will allow schools and governments to start thinking about adaptation measures.
Bresch emphasises the importance of adaptation. He tells Carbon Brief that it is crucial to “take a forward looking view of risk”, adding that it comes with the win-win situation of limiting impacts and likely coming with a lower price tag than waiting for major impacts to hit.
Government plans
Every five years, the UK government publishes its Climate Change Risk Assessment (CCRA), which assesses the “current and future risks to and opportunities for the UK from climate change”.
The National Adaptation Programme (NAP) is published shortly afterwards, allowing administrations such as the Department of Education (DfE) to outline how they are planning to adapt to climate change.
In July 2023, the UK government published its third National Adaptation Programme (NAP3). In this report, the DfE recognised the “significant threat” of rising overheating in schools, and highlighted the need for further research to better understand this risk.
The new study was carried out partly in response to this call for research and has experts from both the UK Met Office and DfE in its author list. Bernie tells Carbon Brief that this study was a collaboration between “climate science, data science, building performance models and stakeholder insights”.
The DfE tells Carbon Brief that it has already allocated £138m to make education buildings more sustainable or more resilient to the impacts of climate change. The UK government’s “strategy for the education and children’s services systems” adds:
“All new school buildings delivered by DfE (not already contracted) will be net-zero in operation. They will be designed for a 2C rise in average global temperatures and future-proofed for a 4C rise, to adapt to the risks of climate change, including increased flooding and higher indoor temperatures.”
However, Rodrigues tells Carbon Brief that “there is still no requirement to design for future climate conditions, even though schools typically have at least a 50-year lifespan, with many occupied continuously for over 100 years”. She adds that “school buildings need to be designed today with tomorrow’s climate in mind”.
The DfE tells Carbon Brief that they are working with partners including the Met Office on the next iteration of this research and will provide more information about it later this year.
The post English schools face ‘overheating’ for one-third of year under 2C warming appeared first on Carbon Brief.
English schools face ‘overheating’ for one-third of year under 2C warming
Greenhouse Gases
Analysis: Reform-led councils threaten 6GW of solar and battery schemes across England
Reform UK’s local-election victories in May 2025 could put 6 gigawatts (GW) of new clean-energy capacity at risk, according to Carbon Brief analysis.
The hard-right populist party took control of 10 English councils in last month’s local elections and has said it will use “every lever” to block new wind, solar and battery projects.
Those 10 areas have jurisdiction over 5,076 megawatts (MW) of battery schemes, 786MW of solar and 56MW of wind, according to Carbon Brief’s analysis of industry data.
While Reform has also pledged to “ban” battery systems, councils do not have direct control over these projects, which are determined by local planning authorities.
It could still influence local planning decisions, planning experts tell Carbon Brief.
However, this is likely to prove a “nuisance” with “limited effect” in terms of the government’s targets for clean power overall, according to one planning lawyer.
Opposing net-zero
Reform UK’s leaders are openly sceptical about the causes and consequences of human-caused climate change. The party is also explicitly opposed to the UK’s net-zero target, which, at a global level, is the only way to stop warming from getting worse, according to scientists.
The party has pledged to “scrap net-zero” if it ever takes power at the national level, falsely asserting that this would free up billions of pounds of public money for tax cuts and welfare programmes.
(Its assertions ignore the fact that the large majority of the investments needed to reach net-zero are expected to come from the private sector, rather than government funds. They also do not account for the economic benefits of lower fossil fuel use or avoided climate impacts. The party’s misleading claims have been widely dismissed by economists.)
Reform UK has also said it would “ban” battery storage projects and impose new taxes on solar and wind power installations.
As it stands, the party only has five MPs in parliament. However, its success in the recent English local elections and favourable polling numbers have raised its profile in UK politics and given it new powers in some areas.
To assess the potential impact of these new powers on clean-energy expansion, Carbon Brief looked at data for 10 local councils where Reform UK won overall control, shown in the map below, including Durham, Kent and Derbyshire, as well as two mayoralties.
(The analysis does not include Warwickshire, where no party gained a majority in the elections. However, a subsequent vote saw the party’s local head selected to lead the county council. He has announced plans to “dumb down” net-zero initiatives in the county.)
Following the election, Richard Tice, Reform MP and deputy leader, said the party would use “every lever” available to block new renewable-energy projects in the areas it now controls.
At the heart of this commitment is Lincolnshire, the location of Tice’s own constituency, Boston and Skegness, which now also has a Reform-run council and a Reform mayor.
The rural county is the site of several large-scale solar project proposals, which have faced a strong backlash from some local people.
This mirrors a wider trend of opposition to solar and battery projects by campaigners, who say they are concerned about, what they allege, could be the impact on the local countryside and farmers.
However, such views are not the norm. Survey data shows overwhelming public support for solar and other renewables across the UK, even if projects are built in people’s local areas.
Analysis by thinktank the Energy and Climate Intelligence Unit also noted that by rejecting net-zero-related projects, Reform UK could threaten thousands of jobs and millions of pounds of investment in areas such as Lincolnshire.
Capacity at risk
In total, some 5,862MW of solar and storage capacity is currently seeking local planning authority planning approval across the 10 Reform-controlled councils, Carbon Brief’s analysis shows. This is broken down by council area in the figure below.
This includes a series of smaller proposed solar farms, each with a capacity of less than 50MW, meaning they need local planning approval.
(The threshold for local planning approval, currently 50MW, is set to rise to 100MW in 2026.)
Solar farms above this capacity threshold go through the “nationally significant infrastructure planning” (NSIP) process. These large-scale projects are then assessed by energy secretary Ed Miliband, who can grant or deny a development consent order.
Local planning authorities (LPAs) are guided by the national planning policy framework (NPPF), rather than the politics of the county councils under which they sit.
However, the Reform-controlled councils overseeing these authorities will likely attempt to assert influence over approvals.
Gareth Phillips, partner at Pinsent Masons law firm and specialist in renewable energy planning and project development, tells Carbon Brief that, while county councils are not responsible for determining planning applications, they do have influence over the outcome.
He tells Carbon Brief:
“[Councils are an] important consultee, required to respond to statutory consultation…which gives the opportunity for county-council members to influence the planning decision…In the case of Reform, it is possible that its elected members may seek to rally support for opposing planning applications, perhaps leading campaigns against the proposals. The risk here is that it may give the perception of credence to opposing views.”
Phillips says that in addition to influencing planning authority decisions, county councils could issue new strategic planning guidelines for their areas. He explains:
“It will be for the LPA to decide what, if any, weight to place on the county council’s views, when determining the planning application. Over time, it’s possible that Reform-led county councils may propose so-called ‘core strategies’, i.e. planning documents setting out strategic level requirements and policy applicable to development proposals in its jurisdiction. Similarly, that policy would be a matter for the LPA to consider and decide how much weight to apply when determining planning applications.”
This risk is mitigated to some extent by the core strategies within the NPPF and the “national policy statements” for energy, he notes.
As such, while local planning authorities will be required to determine the approval or rejection of an application on the basis of wider policy considerations, Reform-led councils could still affect the decision. “Reform-led county councils would have a voice and opportunity to influence planning decisions,” says Philips.
Stand-alone battery energy-storage projects do not have a capacity cap for being processed by local planning authorities, following changes to the regulations in 2020.
However, a number of storage projects that are co-located with solar will be judged under the NSIP process, meaning councils will be unable to block their construction.
Solar strife
Carbon Brief’s analysis looks at projects that have submitted planning permission requests in the 10 Reform-controlled counties, using Solar Energy UK’s SolarPulse database for solar and storage.
The analysis also covers relevant onshore wind projects, based on data from the government’s renewable energy planning database.
(Solar Energy UK notes that the SolarPulse database does not include solar projects with a capacity of less than 5MW.)
The analysis shows that there is 1,866MW of proposed solar capacity awaiting planning permission in Lincolnshire, by far the largest pipeline, as shown in the chart below.
The majority of this capacity is subject to national-level approval as it is above the NSIP threshold. Nevertheless, the county still has the most solar-power projects awaiting permission from the local planning authority, some 166MW.
(A key reason Lincolnshire dominates this picture for solar power development is due to grid capacity. The county was home to several large-scale coal-fired power plants, such as West Burton, which have shuttered in recent years as part of the UK’s transition away from coal. This means there is more capacity for new generators to connect to the grid in the county than in many others, where the system is currently more constrained.)
Overall, the bulk of the proposed capacity at risk is battery storage, which has seen a surge in applications and installations in recent years.
There was 5,013MW of battery storage capacity in operation as of December 2025 and another 5,115MW under construction, according to trade association RenewableUK. It says an additional 40,223MW had planning approval and a further 77,354MW was under development.
Impact of rejection
Overall, even if local planning authorities under the 10 Reform UK-run councils were to reject all of the nearly 6GW of proposed solar and storage capacity in their areas, it would have a limited impact on the UK’s wider solar, storage and wind targets.
If built, the 786MW of proposed solar would generate 757 gigawatt hours (GWh) of electricity. On average, a household in the UK uses 2,700 kilowatt hours (kWh) of electricity each year, meaning these solar farms would be able to power the equivalent of around 280,000 homes – some 1% of the national total.
If all of this proposed solar were rejected and the electricity were generated from gas-fired power stations instead, it would result in an extra 0.3m tonnes of carbon dioxide (CO2) emissions per year. (This is equivalent to less than a tenth of 1% of the UK’s annual total.)
In total, the potential 757GWh of solar power could help displace around £60m of gas per year, based on wholesale prices in 2025 to date.
Private investment could also be impacted. Each 1MW of solar would attract around £1m of investment, meaning the 786MW of capacity would bring roughly £786m into the Reform-led counties. This would have an impact on local supply chains and “community benefit” schemes.
Similarly, battery schemes with four hours of storage capacity also require around £1m of investment per megawatt. This means another £5bn of investment – some 5,076MW of capacity – could be at risk under Reform-led councils.
The total investment at risk for solar and storage is, therefore, close to £6bn.
While a large amount of potential new solar and storage capacity is being proposed in the Reform-led council areas and some could be put at risk as a result, it is also the case that some of these developments could fail for other reasons.
According to research from consultancy Cornwall Insight in February, the current battery storage “connection queue” is double the grid’s requirement for 2030. This means there are many more projects in the queue to gain access to the electricity network than needed.
The government’s plan for reaching its target of “clean power 2030” sets a guideline of 27GW of storage capacity by the end of this decade, whereas some 61GW of battery projects are seeking a grid connection over the same period.
This means the UK would have enough options to meet its 2030 storage requirements even if some proposed battery projects fail due to Reform-led councils, says Ed Porter, global director of industry for battery analysts Modo Energy. He tells Carbon Brief:
“With more than 50GW of battery projects with planning consent, projects could be targeted in Reform areas, but the UK would still have sufficient options to meet clean-power 2030 targets, subject to the achievable build out rate of storage projects.”
The main outcome of Reform-led refusals would be to block profitable projects that could reduce consumer costs and cut CO2 emissions, Porter adds.
Still, there is no guarantee that all of these projects – and the solar proposals – would have received planning permission if Reform UK had not been elected in the relevant areas.
According to figures from Solar Media Market Research, the local authority refusal rate for proposed solar-power projects rose to almost 25% in 2024, the highest on record. This is up from 15% in 2022 and 20% in 2023.
However, the majority of projects that are refused by local authorities still end up being approved. Over the past five years, some 80% of projects that went to appeal were subsequently approved, according to Solar Media. All 12 of the solar projects that have gone to appeal in 2025 to date have been approved.
Battery energy-storage refusals hit a high of 22% in 2024, according to Solar Media. However, in 2025 so far, this has dropped to 9%.
Connections challenge
Even if Reform UK-led councils are unable to block clean-energy developments outright, the party’s pledge to “fight [developers] every step of the way” could still make the process more challenging.
One key way this could hamper the development of renewable energy technologies is by forcing them to go through the appeals process, extending the time it takes to gain planning permission by as much as a year.
Following changes to the grid connections queue, new connection agreements include strict delivery deadlines for obtaining planning permission.
As such, if a project ends up going to appeal – and is, therefore, delayed – it could risk missing deadlines and having its grid connection agreement terminated.
Additionally, with the capacity limit for NSIPs set to change in December, more projects – solar projects between 50MW and 100MW – will go to local planning authorities for approval. This will increase the number that could be threatened by Reform UK’s influence.
Ultimately, though, there is limited renewable-energy capacity seeking planning permission in Reform-controlled counties, more than enough capacity in planning nationally to meet targets, plus the role of the council in what is – or is not – approved is limited.
Planning lawyer Philips concludes that Reform-led councils are only likely to cause a “nuisance”, with “limited effect”. He says:
“In summary, there is the potential for Reform-led county councils to cause a nuisance for renewable energy projects in the planning process, but this will be limited in effect.
“I’m not concerned about this because of the weight of policy support there is for those projects, which should serve to mitigate the influence Reform could otherwise have.”
The post Analysis: Reform-led councils threaten 6GW of solar and battery schemes across England appeared first on Carbon Brief.
Analysis: Reform-led councils threaten 6GW of solar and battery schemes across England
Greenhouse Gases
DeBriefed 13 June 2025: Trump’s ‘biggest’ climate rollback; UK goes nuclear; How Carbon Brief visualises research
Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Trump’s latest climate rollback
RULES REPEALED: The US Environmental Protection Agency (EPA) has begun dismantling Biden-era regulations limiting pollution from power plants, including carbon dioxide emissions, reported the Financial Times. Announcing the repeal, climate-sceptic EPA administrator Lee Zeldin labelled efforts to fight climate change a “cult”, according to the New York Times. Politico said that these actions are the “most important EPA regulatory actions of Donald Trump’s second term to date”.
WEBSITE SHUTDOWN: The Guardian reported that the National Oceanic and Atmospheric Administration (NOAA)’s Climate.gov website “will imminently no longer publish new content” after all production staff were fired. Former employees of the agency interviewed by the Guardian believe the cuts were “specifically aimed at restricting public-facing climate information”.
EVS TARGETED: The Los Angeles Times reported that Trump signed legislation on Thursday “seeking to rescind California’s ambitious auto emission standards, including a landmark rule that eventually would have barred sales of new gas-only cars in California by 2035”.
UK goes nuclear
NEW NUCLEAR: In her first spending review, UK chancellor Rachel Reeves announced £14.2bn for the Sizewell C new nuclear power plant in Suffolk, England – the first new state-backed nuclear power station for decades and the first ever under a Labour government, BBC News reported. The government also announced funding for three small nuclear reactors to be built by Rolls-Royce, said the Times. Carbon Brief has just published a chart showing the “rise, fall and rise” of UK nuclear.
MILIBAND REWARDED: The Times described energy secretary Ed Miliband as one of the “biggest winners” from the review. In spite of relentless negative reporting around him from right-leaning publications, his Department of Energy Security and Net Zero (DESNZ) received the largest relative increase in capital spending. Carbon Brief’s summary has more on all the key climate and energy takeaways from the spending review.
Around the world
- UN OCEAN SUMMIT: In France, a “surge in support” brought the number of countries ratifying the High Seas Treaty to just 10 short of the 60 needed for the agreement to become international law, according to Sky News.
- CALLING TRUMP: Brazil’s president Luiz Inácio Lula da Silva said he would “call” Trump to “persuade him” to attend COP30, according to Agence France-Presse. Meanwhile, the Associated Press reported that the country’s environmental agency has fast tracked oil and highway projects that threaten the Amazon.
- GERMAN FOSSIL SURGE: Due to “low” wind levels, electricity generation from renewables in Germany fell by 17% in the first quarter of this year, while generation from fossil-fuel sources increased significantly, according to the Frankfurter Allgemeine Zeitung.
- BATTERY BOOST: The power ministry in India announced 54bn rupees ($631m) in funding to build 30 gigawatt-hours of new battery energy storage systems to “ensure round-the-clock renewable energy capacities”, reported Money Control.
-19.3C
The temperature that one-in-10 London winters could reach in a scenario where a key Atlantic ocean current system “collapses” and global warming continues under “intermediate” emissions, according to new research covered by Carbon Brief.
Latest climate research
- A study in Science Advances found that damage to coral reefs due to climate change will “outpace” reef expansion. It said “severe declines” will take place within 40-80 years, while “large-scale coral reef expansion requires centuries”.
- Climatic Change published research which identified “displacement and violence, caregiving burdens, early marriages of girls, human trafficking and food insecurity” as the main “mental health” stressors exacerbated by climate change for women in lower and middle-income countries.
- The weakening of a major ocean current system has partially offset the drying of the southern Amazon rainforest, research published in Environmental Research has found, demonstrating that climate tipping elements have the potential to moderate each other.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Aerosols – tiny light‑scattering particles produced mainly by burning fossil fuels – absorb or reflect incoming sunlight and influence the formation and brightness of clouds. In this way they have historically “acted as an invisible brake on global warming”. New Carbon Brief analysis by Dr Zeke Hausfather illustrated the extent to which a reduction in aerosol emissions in recent decades, while bringing widespread public health benefits through avoided deaths, has “unmasked” the warming caused by CO2 and other greenhouse gases. The chart above shows the estimated cooling effect of aerosols from the start of the industrial era until 2020.
Spotlight
How Carbon Brief turns complex research into visuals
This week, Carbon Brief’s interactive developer Tom Pearson explains how and why his team creates visuals from research papers.
Carbon Brief’s journalists will often write stories based on new scientific research or policy reports.
These documents will usually contain charts or graphics highlighting something interesting about the story. Sometimes, Carbon Brief’s visuals team will choose to recreate these graphics.
There are many reasons why we choose to spend time and effort doing this, but most often it can be boiled down to some combination of the following things.
Maintaining editorial and visual consistency
We want to, where possible, maintain editorial and visual consistency while matching our graphical and editorial style guides.
In doing this, we are trying to ease our audience’s reading experience. We hope that, by presenting a chart in a way that is consistent with Carbon Brief’s house style, readers will be able to concentrate on the story or the explanation we are trying to communicate and not the way that a chart might have been put together.
Highlighting relevant information
We want to highlight the part of a chart that is most relevant to the story.
Graphics in research papers, especially if they have been designed for a print context, often strive to illustrate many different points with a single figure.
We tend to use charts to answer a single question or provide evidence for a single point.
Paring charts back to their core “message”, removing extraneous elements and framing the chart with a clear editorial title helps with this, as the example below shows.
Ensuring audience understanding
We want to ensure our audience understands the “message” of the chart.
Graphics published in specialist publications, such as scientific journals, might have different expectations regarding a reader’s familiarity with the subject matter and the time they might be expected to spend reading an article.
If we can redraw a chart so that it meets the expectations of a more general audience, we will.
Supporting multiple contexts
We want our graphics to make sense in different contexts.
While we publish our graphics primarily in articles on our website, the nature of the internet means that we cannot guarantee that this is how people will encounter them.
Charts are often shared on social media or copy-pasted into presentations. We want to support these practices by including as much context relevant to understanding within the chart image as possible.
Below illustrates how adding a title and key information can make a chart easier to understand without supporting information.
When we do not recreate charts
When will we not redraw a chart? Most of the time! We are a small team and recreating data graphics requires time, effort, accessible data and often specialist software.
But, despite these constraints, when the conditions are right, the process of redrawing maps and charts allows us to communicate more clearly with our readers, transforming complex research into accessible visual stories.
Watch, read, listen
SPENDING $1BN ON CLIMATE: New Scientist interviewed Greg de Temmerman, former nuclear physicist turned chief science officer at Quadrature Climate Foundation, about the practicalities and ethics of philanthropic climate-science funding.
GENDER HURDLES: Research director Tracy Kajumba has written for Climate Home News about the barriers that women still face in attending and participating in COPs.
OCEAN HEATWAVES: The New York Times presented a richly illustrated look at how marine heatwaves are spreading across the globe and how they affect life in the oceans.
Coming up
- 16-26 June: Bonn climate talks, Bonn, Germany
- 16 June: 79th meeting of the World Meteorological Organization executive council, Geneva, Switzerland
- 17 June: International Energy Agency (IEA) Oil 2025 report launch
Pick of the jobs
- Inside Climate News, California environmental reporter | Salary: Unknown. Location: Southern California
- Natural Resources Wales, lead marine and energy policy advisor | Salary: £45,367-£50,877. Location: Wales
- Children’s Investment Fund Foundation, senior manager, climate | Salary: £82,000. Location: London/hybrid
- Green Party,social media and digital content officer | Salary: £33,211. Location: London/remote
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.
The post DeBriefed 13 June 2025: Trump’s ‘biggest’ climate rollback; UK goes nuclear; How Carbon Brief visualises research appeared first on Carbon Brief.
The UK’s chancellor Rachel Reeves gave the green light this week to the Sizewell C new nuclear plant in Suffolk, along with funding for “small modular reactors” (SMRs) and nuclear fusion.
In her spending review of government funding across the rest of this parliament, Reeves pledged £14.2bn for Sizewell C, £2.5bn for Rolls-Royce SMRs and £2.5bn for fusion research.
The UK was a pioneer in civilian nuclear power – opening the world’s first commercial reactor at Calder Hall in Cumbria in 1956 – which, ultimately, helped to squeeze out coal generation.
Over the decades that followed, the UK’s nuclear capacity climbed to a peak of 12.2 gigawatts (GW) in 1995, while electricity output from the fleet of reactors peaked in 1998.
The chart below shows the contribution of each of the UK’s nuclear plants to the country’s overall capacity, according to when they started and stopped operating.
The reactors are dotted around the UK’s coastline, where they can take advantage of cooling seawater, and many sites include multiple units coded with numbers or letters.
Since Sizewell B was completed in 1995, however, no new nuclear plants have been built – and, as the chart above shows, capacity has ebbed away as older reactors have gone out of service.
After a lengthy hiatus, the Hinkley C new nuclear plant in Somerset was signed off in 2016. It is now under construction and expected to start operating by 2030 at the earliest.
(Efforts to secure further new nuclear schemes at Moorside in Cumbria failed in 2017, while projects led by Hitachi at Wylfa on Anglesey and Oldbury in Gloucestershire collapsed in 2019.)
The additional schemes just given the go-ahead in Reeves’s spending review would – if successful – somewhat revive the UK’s nuclear capacity, after decades of decline.
However, with the closure of all but one of the UK’s existing reactors due by 2030, nuclear-power capacity would remain below its 1995 peak, unless further projects are built.
Moreover, with the UK’s electricity demand set to double over the next few decades, as transport, heat and industry are increasingly electrified, nuclear power is unlikely to match the 29% share of generation that it reached during the late 1990s.
There is an aspirational goal – set under former Conservative prime minister Boris Johnson – for nuclear to supply “up to” a quarter of the UK’s electricity in 2050, with “up to” 24GW of capacity.
Assuming Sizewell B continues to operate until 2055 and that Hinkley C, Sizewell C and at least three Rolls-Royce SMRs are all built, this would take UK capacity back up to 9.0GW.
Methodology
The chart is based on data from the World Nuclear Association, with known start dates for operating and retired reactors, as well as planned closure dates announced by operator EDF.
The timeline for new reactors to start operating – and assumed 60-year lifetime – is illustrative, based on published information from EDF, Rolls-Royce, the UK government and media reports.
The post Chart: The rise, fall and rise of UK nuclear power over eight decades appeared first on Carbon Brief.
Chart: The rise, fall and rise of UK nuclear power over eight decades
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