United Kingdom[]
| No. | Portrait | Name | Tenure | |
|---|---|---|---|---|
| Took office | Left office | |||
| 1 | 
|
James Callaghan | 5 April 1976 | 4 May 1979 |
| 2 | 
|
Margaret Thatcher | 4 May 1979 | 28 November 1990 |
| 3 | 
|
John Major | 28 November 1990 | 2 May 1997 |
| 4 | 
|
Tony Blair | 2 May 1997 | 27 June 2007 |
| 5 | 
|
Gordon Brown | 27 June 2007 | 11 May 2010 |
| 6 | 
|
David Cameron | 11 May 2010 | |