Press release: 18 July 2022

Historic High Court ruling finds UK government’s climate strategy ‘unlawful’

In a landmark victory for climate justice that comes as the UK faces its hottest day on record, the High Court has ruled that the government’s Net Zero Strategy breaches the Climate Change Act.

The three legal challenges brought by ClientEarth, Friends of the Earth, Good Law Project and environmental campaigner Jo Wheatley, were heard together at the Royal Courts of Justice in June.

In a judgment published today – amid the Met Office’s first ever red alert for extreme heat – Mr Justice Holgate finds that the Net Zero Strategy, which sets out plans to decarbonise the economy, doesn’t meet the government’s obligations under the Climate Change Act to produce detailed climate policies that show how the UK’s legally-binding carbon budgets will be met. 

It also finds that parliament and the public were effectively kept in the dark about a shortfall in meeting a key target to cut emissions.

The ruling states that Greg Hands, the minister for business, energy and industrial strategy, who was responsible for signing off the Net Zero Strategy, didn’t have the legally required information on how carbon budgets would be met. However, he nevertheless approved the strategy.

Now that it’s been found unlawful, the government will have to update its climate strategy to include a quantified account of how its policies will achieve climate targets, based on a realistic assessment of what it actually expects them to deliver. The updated strategy will have to be presented to parliament for scrutiny by MPs.

The refreshed plan should include sound policies that stand up to the scrutiny of the Climate Change Committee (CCC), which recently found that credible plans exist for just two fifths of the government’s required emissions reductions. The judgment strengthens the critical expert role of the committee by stating that their advice must be given “considerable weight”.

During the court proceedings, it emerged that behind-the-scenes calculations by civil servants to quantify the impact of emissions cuts from policies in the government’s Net Zero Strategy did not add up to the reductions necessary to meet the sixth carbon budget – the volume of greenhouse gases the UK can emit during the period 2033-37.

This 5% shortfall over the sixth carbon budget is significant in climate terms and totals around 75 million tonnes of CO2e – equivalent to almost the total annual emissions from all car travel in the UK*. It’s also possible that a realistic estimate of the shortfall would be much greater than 5%, given concerns raised at the hearing about the robustness of the methodology used for the calculation. 

These figures were not shared with parliament, or made available for public scrutiny. The judgment stresses the importance of government transparency and the essential role of parliamentary accountability in efforts to tackle the climate crisis.

Sam Hunter Jones, senior lawyer at ClientEarth, said: 

“This decision is a breakthrough moment in the fight against climate delay and inaction. It forces the Government to put in place climate plans that will actually address the crisis.

“The court has emphasised that the risks to delivery of the UK’s climate targets are “all- important” – the Government must now address those risks when it prepares a revised strategy that meets the requirements of the Climate Change Act. 

“This is also an opportunity to move further and faster away from the expensive fossil fuels that are adding to the crippling cost of living crisis people are facing.  

“The decision confirms that the Government must show how its plans will deliver the carbon budget targets in full. 

“Its approach must also be realistic and based on what it actually expects its plans to achieve. And the Government must set out the emissions reductions expected from its individual policies so that the public and parliament can properly hold it to account. This is a huge win for climate justice and accountability.”

Friends of the Earth lawyer Katie de Kauwe said:

“We’re proud to have worked on this historic case. Taking strong action to cut carbon emissions is a win-win. Not only is it essential to preventing climate breakdown, but we can also tackle the cost of living crisis with cheap, renewable energy.

“This landmark ruling is a huge victory for climate justice and government transparency. It shows that the Climate Change Act is a piece of legislation which has teeth, and can, if necessary, be enforced through our court system if the government does not comply with its legal duties. 

“More than a decade ago, Friends of the Earth spearheaded the grassroots campaign that led to this vital piece of legislation. Today, we have strengthened its enforcement, which is so crucial to our country’s ability to tackle the climate crisis.”

Jolyon Maugham, Director of Good Law Project said:

The illegality of its flagship climate change strategy is a huge political embarrassment to the Government. The Net Zero target must be a road map to a sustainable future - not a lie we tell our children.  

“We are thrilled to have worked alongside our friends at ClientEarth and Friends of the Earth to deliver this landmark victory.”


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About ClientEarth

*Total annual emissions from cars in the UK totalled 79.6 million tonnes CO2e in 2019. Levels fell in 2020 due to the pandemic but are rising back to pre-Covid levels.

ClientEarth is a non-profit organisation that uses the law to create systemic change that protects the Earth for – and with – its inhabitants. We are tackling climate change, protecting nature and stopping pollution, with partners and citizens around the globe. We hold industry and governments to account, and defend everyone’s right to a healthy world. From our offices in Europe, Asia and the USA we shape, implement and enforce the law, to build a future for our planet in which people and nature can thrive together. You can find out more about our legal challenge against the UK Government over its net zero strategy here:  

Friends of the Earth is an international community dedicated to the protection of the natural world and the wellbeing of everyone in it. We bring together more than two million people in 75 countries, combining people power all over the world to transform local actions into global impact. Follow us at @friends_earth, or like our Facebook page.

Good Law Project is a not for profit that uses the law for a better world. We had a primary role in overturning the prorogation of Parliament in 2019 and more recently has been shining a spotlight on the Government’s awarding of lucrative Covid contracts to their friends and associates. You can find out more about our Net Zero legal challenge here: