| Anne Margaret Hinnigan | Director | 11 Dec 2000 | 16 Dec 2001 | British | 61 years |
| Anthony Robert Hylton Welford | Director | 29 Dec 1990 | 15 Dec 1995 | British | 69 years |
| David Bruce Montague Worthington | Director | 29 Dec 1990 | 4 Feb 2010 | British | 76 years |
| David Rhys Emanuel | Director | 23 Sept 2010 | 10 Jun 2021 | British | 62 years |
| Derek James Bellew | Director | 29 Dec 1990 | 4 Feb 2010 | British | 84 years |
| Gary Edward Philpott | Director | 12 Jun 2002 | 30 Nov 2015 | British | 68 years |
| Ian Richard Whitehall | Director | 1 Jul 1997 | 12 Mar 1999 | British | 63 years |
| Jonathan David Rathbone | Director | 5 Jan 2005 | 18 Nov 2005 | British | 51 years |
| Martin John Carroll | Director | 17 Feb 1998 | 19 Mar 1999 | British | 64 years |
| Nicholas Smith | Director | 11 Dec 2001 | 19 Jul 2016 | British | 67 years |
| Nigel Robert Moger Campbell | Director | 29 Dec 1990 | 7 Aug 1998 | British | 77 years |
| Richard Jon Hiscoke | Director | 8 Oct 2008 | 3 Apr 2017 | British | 50 years |
| Rosemary Anne Collins | Director | 15 Dec 1995 | 30 Apr 1999 | British | 65 years |
| Simon Staples | Director | 15 Aug 2007 | 6 Mar 2009 | British | 57 years |
| Stuart James Matthew Whitfield | Director | 10 Aug 1992 | 2 Oct 1998 | British | 62 years |
| Susan Debra Hughes | Director | 8 Jan 1999 | 16 Jul 2009 | British | 66 years |
| Ursula Moira Smith Gould | Director | 8 Dec 1993 | 11 Dec 2000 | British | 62 years |
| William John Price | Director | 29 Dec 1990 | 13 Jan 1994 | British | 69 years |