Edward Julian Udny-Lister, Baron Udny-Lister, Kt, PC (born 25 October 1949) is a British special adviser, political strategist and former politician who served as Downing Street Chief of Staff from 2019 to 2021. He originally solely advised on strategy until the departure of Dominic Cummings as Chief Adviser to the Prime Minister in November 2020. He was previously the Deputy Mayor of London for Policy between 2011 and 2016 and was also Leader of Wandsworth Council from 1992 to 2011.