| Alexander Timothy Pearce Higgins | Director | 25 Apr 1997 | 31 May 1998 | British | 87 years |
| Bryony Jane Falkus | Director | 6 Jul 1999 | 1 Jun 2005 | British | 73 years |
| Duncan Macgregor Ogilvy | Director | 25 Apr 1997 | 3 Nov 2009 | British | 73 years |
| Guy Robert Hinchley | Director | 3 Nov 2009 | 1 Jul 2015 | British | 65 years |
| James Matthew Sawer | Director | 25 Apr 1997 | 6 Sept 2000 | British | 66 years |
| Justin Jolyon Peter Ripman | Director | 19 Feb 1999 | 3 Nov 2009 | British | 64 years |
| Justin Jolyon Peter Ripman | Director | 1 Jul 2015 | 31 May 2023 | British | 64 years |
| Michael Marsh Orr | Director | 25 Apr 1997 | 31 May 1998 | British | 87 years |
| Peter Willoughby Furnivall | Director | 25 Apr 1997 | 3 Nov 2009 | British | 71 years |
| Peter Willoughby Furnivall | Secretary | 25 Apr 1997 | 3 Nov 2009 | British | - |
| Richard Mark Jeffries | Director | 19 Feb 1999 | 1 Jul 2015 | British | 68 years |
| Roger James Bamber | Director | 25 Apr 1997 | 3 Nov 2009 | British | 70 years |
| Susan Jack | Director | 25 Apr 1997 | 30 May 2007 | British | 73 years |