Is a leading barrister in the United Kingdom, and crossbencherin the House of Lords. He practises mainly in the areas of public law and human rights. He argued 100 cases before the Appellate Committee of the House of Lords before its replacement by the new Supreme Court of the United Kingdom in October 2009, has argued more than 30 cases in the European Court of Justice, and more than 30 cases before the European Court of Human Rights.