| John Denis Fraser | 1966 | |
| Nicholas Ridley | 1970 | 1972 |
| Sir John Ambrose Cope | 1972 | 1974 |
| Peter Frank Hannibal Emery | 1972 | 1974 |
| Cranley Gordon Douglas Onslow | 1972 | February 1974 |
| John Patrick Butcher | 1982 | June 1987 |
| David Austin Trippier | 1983 | September 1985 |
| Sir Robert James Atkins | 1987 | 1989 |
| Edward Julian Egerton Leigh | 1990 | 1993 |
| Patrick Allan McLoughlin | 27 May 1993 | 20 July 1994 |
| Jonathan Peter Evans | 1994 | 1995 |
| Ian Colin Taylor | 1994 | 2 May 1997 |
| Phillip Anthony Charles Lawrence Oppenheim | 1995 | 23 July 1996 |
| Richard Lewis Page | 1995 | 2 May 1997 |
| John Mark Taylor | 1995 | 2 May 1997 |
| Barbara Maureen Roche | 5 May 1997 | 1998 |
| Nigel Griffiths | 5 May 1997 | 9 May 2005 |
| Michael David Wills | 1998 | 29 July 1999 |
| Alan Arthur Johnson | 29 July 1999 | 11 June 2001 |
| Douglas Garven Alexander | June 2001 | May 2002 |
| Melanie Jane Johnson | 11 June 2001 | 13 June 2003 |
| Gerard Sutcliffe | 13 June 2003 |