The Centre for European Legal Studies (CELS) hosts an annual public lecture in honour of Lord Mackenzie-Stuart, the first British Judge to be President of the Court of Justice. Among the eminent scholars of European legal studies invited to give the lecture are Professor Joseph Weiler, former Judge David Edwards of the European Court of Justice, and Advocate-General Francis Jacobs of the European Court of Justice. The texts of the Mackenzie-Stuart Lectures are published in the Cambridge Yearbook of European Legal Studies. The 2019 Mackenzie-Stuart Lecture was delivered by Commissioner Margrethe Vestager, European Commission, under the title 'Making Markets Work: New Challenges for EU Competition Law' on 4 February 2019. More information about this lecture, including photographs from the event, is available from the Centre for European Legal Studies website at: https://www.cels.law.cam.ac.uk/mackenzie-stuart-lectures