Lord Carnwath retired as a Justice in March 2020 after a distinguished judicial career which culminated in him spending 8 years sitting in the UK Supreme Court and as a member of the Judicial Committee of the Privy Council.  Previously he had been in practice at the Bar specialising in planning, local government and administrative law. During his tenure in the Supreme Court, he gave many leading judgments, particularly on issues relating to planning and the environment, property, rating, local government and administrative law. He has now returned to practice in his former chambers. He has a number of academic positions, including as Visiting Professor in Practice at the Grantham Institute on Climate Change and the Environment (LSE). Until he stood down last year, he was Honorary President of PEBA.