The Baroness Brinton, a British Liberal Democrat politician who served as Leader of the Liberal Democrats, took office on July 22, 2019 and left office on December 13, 2019.
Jo Swinson lost her seat in the general election held on 12 December 2019, thus ceasing to be leader; deputy leader Ed Davey and Party President Sal Brinton became acting co-leaders. Brinton was replaced by Mark Pack following his assuming the office of Party President on 1 January 2020. 
