| Anthony Robert Hylton Welford | Director | 1 Mar 1993 | 14 Sept 1996 | British | 69 years |
| Charles Nigel Sommerville | Director | 14 Sept 1991 | 30 Apr 2000 | British | 85 years |
| David Bruce Montague Worthington | Director | 30 Sept 1992 | 1 May 2008 | British | 76 years |
| David Michael Rendell | Director | 14 Sept 1991 | 29 Oct 2002 | British | 79 years |
| Derek James Bellew | Director | 14 Sept 1991 | 1 May 2008 | British | 84 years |
| Evan Wayne Thomas | Director | 1 Jun 2000 | 12 Mar 2004 | British | 83 years |
| Gary Edward Philpott | Director | 29 Jul 2013 | 30 Nov 2015 | British | 68 years |
| Hugh Graham Barraclough | Director | 14 Sept 1991 | 1 Mar 1993 | British | 91 years |
| Huw Charles Morgan | Director | 1 May 2008 | 30 Jul 2013 | British | 63 years |
| John Dudley Bedford | Director | 14 Sept 1991 | 19 Apr 2000 | British | 90 years |
| Kenneth Ian Crawford | Director | 14 Sept 1991 | 14 Dec 1994 | British | 95 years |
| Michael Warren Davies | Director | 29 Oct 2002 | 1 May 2008 | British | 81 years |
| Nigel Robert Moger Campbell | Director | 14 Sept 1991 | 7 Aug 1998 | British | 77 years |
| Nigel Simon Nicholas Burnell | Director | 14 Sept 1991 | 30 Sept 1992 | British | 74 years |
| Noelle Mary Mccartney | Director | 24 Sept 1996 | 29 Oct 2002 | British | 72 years |
| Richard George Brown | Director | 1 May 2008 | 30 Jul 2013 | British | 74 years |
| Simon Richard Benedict Heald | Director | 1 May 2008 | 16 Apr 2024 | British | 64 years |
| Timothy Martin David Smithers | Director | 1 May 2008 | 4 Feb 2011 | British | 68 years |
| Ursula Moira Smith Gould | Director | 1 Jun 2000 | 11 Dec 2000 | British | 62 years |
| William John Price | Director | 14 Sept 1991 | 18 Jan 1994 | British | 69 years |
| William Simon Baker | Director | 14 Sept 1991 | 1 May 2008 | British | 81 years |