REALIGNMENT: A New Party System
(Falklands War Lost)
1979-82: Margaret Thatcher (Conservative)
- 1979 (majority) def: Jim Callaghan (Labour), David Steel (Liberal)
1982-84: Willie Whitelaw (Conservative)
1984-89: Roy Jenkins (Social Democratic)
- 1984 (with Liberals) def: Willie Whitelaw (Conservative), Michael Foot (Labour), David Steel (Liberal)
1989-1996: Shirley Williams (Social Democratic)
- 1989 (with Liberals) def: Tony Benn (Labour), Norman Tebbit (Conservative), David Steel (Liberal)
- 1993 (with Conservatives) def: Tony Benn (Labour), Cecil Parkinson (Conservative), Alan Beith (Liberal)
1996-98: David Owen (Social Democratic)
1998-2005: John Prescott (Labour)
- 1998 (minority) def: David Owen (Social Democratic), Cecil Parkinson (Conservative), Michael Meadowcroft (Liberal)
- 2000 (with Liberals) def: Ann Widdecombe (Conservative), Paddy Ashdown (Liberal), Rosie Barnes (Social Democratic)
2004-09: Michael Portillo (Conservative)
- 2004 (with Social Democrats) def: John Prescott (Labour), Paddy Ashdown (Liberal), Tony Blair (Social Democratic)
2009-14: Charles Kennedy (Progressive)
- 2009 (with Labour & Greens) def: John McDonnell (Labour), Michael Portillo (Conservative), Caroline Lucas (Green)
2014-18: John McDonnell (Labour)
- 2014 (with Progressives & Greens) def: Charles Kennedy (Progressive), Ken Clarke (Conservative), Nigel Farage (UK Independence), Caroline Lucas (Green)
2018-20: Nigel Farage (UK Independence)
- 2018 (with Conservatives) def: John McDonnell (Labour), Vince Cable (Progressive), Caroline Lucas (Green), Theresa May (Conservative), Maurice Glasman (Peoples')
2020-25: Norman Lamb (Progressive)
- 2020 (with Labour & Greens) def: Diane Abbott (Labour), Nigel Farage (UK Independence), Michael Gove (Conservative), Sian Berry (Green), Maurice Glasman (Peoples')
2025-?: Laura Pidcock (Labour)
- 2025 (with Progressives & Greens) def: Norman Lamb (Progressive), Michael Gove (Conservative), Sian Berry (Green)