This collection of essays is a tribute to Lord Kerr of Tonaghmore, who died aged 72 on 1 December 2020 after having retired from the UK Supreme Court just two months earlier. Brian Kerr was appointed as a judge of the High Court of Northern Ireland in 1993. He became the Lord Chief Justice of Northern Ireland in 2004 before being elevated to a peerage and appointed as the last Lord of Appeal in Ordinary in June 2009. Four months later, as Lord Kerr, he moved from the Appellate Committee of the House of Lords to the UK Supreme Court where, after exactly 11 years, he concluded his...

This book provides a detailed account of each law officer’s functions and draws on that account as the basis for a conceptual analysis of their constitutional legitimacy. In recent years, the constitutional legitimacy of law officers has been questioned repeatedly because of recurring controversies surrounding the discharge of their varied functions. Indeed, it has become increasingly clear that those functions enable law officers to play a highly influential part in the regulation and exercise of public power throughout the United Kingdom. McCormick argues that the most persuasive...