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Carol Day

Associate solicitor

Carol founded the firm's environmental litigation service in 2013

Environment Judicial review Planning Wildlife

Carol Day has worked in the environmental sector for over 25 years. She trained as a solicitor at Leigh Day and re-joined the firm to run the environmental litigation service in 2013.

After completing an MSc in Nature Conservation (UCL), Carol started her career in the voluntary sector as a campaigner working on environmental policy. Through her employment with two County Wildlife Trusts (Warwickshire and Surrey) and a decade on planning and site safeguard work with WWF-UK, she developed an in-depth understanding of UK/EU environmental issues.

What people say

"To say that we could not have done it without you is an obvious statement, but we had not realised what a high level of care and advice you would offer."

What the directories say

She is a significant expert in environmental law with a particular expertise in access to environmental justice matters.

Chambers and partners 2024

Legal expertise

Carol qualified as a lawyer in 2002 and spent the next decade advising WWF policy staff on a wide range of issues including biodiversity, freshwater, marine and fisheries (including the passage of the Marine and Coastal Access Act 2009) and forests. This work required her to work with a wide variety of NGO partners to take cases in the UK and European courts and influence legislation through various Parliamentary processes.

An area of particular interest for Carol is access to justice. Between 2003 and 2013, she was the coordinator of the Coalition for Access to Justice for the Environment (CAJE), a grouping of seven environmental NGOs lobbying for changes to the law for environmental cases. During that period, she worked closely with civil servants at the UN and the European Commission, Defra and the Ministry of Justice and members of the senior judiciary. She was co-author of Environmental Justice and sat on Lord Justice Sullivan’s Working Group, whose whose reports influenced the case-law of the courts and international complaint procedures leading to the reform of the costs rules in 2013. In 2012, she was also contracted as a UK expert by the European Commission to co-author a report on access to justice in the UK. CAJE also intervened in a number of leading cases, including Garner (R oao Garner v Elmbridge Borough Council).

Carol has presented at numerous national and international forums, including conferences organised by the UN, European Commission, the European Environmental Bureau and Chambers. She has published articles on a number of environmental issues in the Environmental Law Review, New Law Journal, Environmental Policy and Law and Journal of Water Law. She is the Vice-Chair of Wildlife and Countryside Link’s Legal Strategy Group and a member of a wide variety of environmental charities.

Carol is listed in the 2022 inaugural ENDS Power List that names the 100 UK environmental professionals who have made the greatest impact in the past two years.

What the directories say

There is nothing she does not know about the habitats regime.

Chambers and partners 2023



News Article
Supreme Court
Human rights Environment Surrey oil wells

Historic Supreme Court judgment rules planning permission for oil production at Horse Hill, Surrey is unlawful and must be overturned

In a ground-breaking judgment the Supreme Court has today, Thursday 20 June 2024, ruled that planning permission for fossil fuel production should not be granted unless and until a planning authority has properly assessed the climate impact of the project and specifically assessed the downstream greenhouse gas (GHG) emissions that will inevitably arise from the combustion of the fuel.

News Article
Offshore Gass
Human rights Environment Oil and gas

Oceana threatens legal action over harm to UK seas from latest offshore oil and gas licensing

Oceana UK is preparing to take the government to court over the severe threat to marine life caused by the latest licences for oil and gas exploration in UK waters.

News Article
Environment Wildlife Wild justice

Government concedes that former Environment Secretary unlawfully granted gamebird release licences for protected areas against Natural England advice

The Government has conceded a claim by environmental group Wild Justice alleging the unlawful grant of licences for the release of gamebirds in and around two protected habitats.