¹ Campbell served as acting leader between the resignation of on 7 January 2006 and his own election as leader on 2 March 2006.

² Cable served as acting leader between the resignation of on 15 October 2007 and the election of Nick Clegg on 18 December 2007.

³ After leader lost her seat in the 2019 General Election, Ed Davey in his role as Deputy Leader and Mark Pack as Party President became acting co-leaders until a leadership election could be held in 2020.