| Merlyn Rees | 1965 | 1966 |
| David Hedley Ennals | 1966 | 1967 |
| Ian Hedworth John Little Gilmour | April 1970 | 1971 |
| Geoffrey Johnson Smith | 1971 | 1972 |
| Sir Peter Allan Renshaw Blaker | 1972 | 1974 |
| Dudley Gordon Smith | 7 January 1974 | 4 March 1974 |
| Bernard John Hayhoe | 4 May 1979 | 5 January 1981 |
| Philip Carter Goodhart | 29 May 1981 | 14 September 1981 |
| Alfred William Wiggin | September 1981 | 1983 |
| Roger Norman Freeman | May 1986 | December 1988 |
| Sir Michael Jon Neubert | 1988 | 1989 |