Estelle Dehon is a public law barrister at Cornerstone Barristers. She is recognised as a leading junior in environment and planning law, with particular expertise in climate change matters. This year Estelle represented South Lakes Action on Climate Change in the inquiry opposing a new coal mine in Cumbria; appeared in the Court of Appeal for Sarah Finch and the Wield Action Group, opposing new oil development in Surrey; represented Bristol Area Action Network in the inquiry opposing expansion of Bristol Airport and advised the Group for Action on Leeds Bradford Airport in opposing expansion of Leeds Bradford Airport, and is representing Wild Justice in their challenge to burning on peat bogs. Her broader public law work includes representing All the Citizens in their challenge to the use by the Prime Minister and others of “disappearing messages” in WhatsApp and Signal. The other main area of Estelle’s practice is data protection and access to information. She is a member of the European Commission’s Multistakeholder Expert Group on the GDPR, which assists the Commission in dealing with potential challenges in implementing the GDPR across Europe. She is representing the investigative journalist Stefania Maurizi in her FOIA challenges concerning information relating to the extradition of Julian Assange and the Met Police’s investigation of WikiLeaks staff members.