| Brian Kenneth Jackson | Director | 9 May 1991 | 30 Apr 1992 | British | 88 years |
| Danielle Elizabeth Stanborough | Secretary | 31 Mar 2017 | 12 Jan 2018 | - | - |
| David Ernest Palmer | Director | 13 Apr 1993 | 23 Apr 1993 | British | 91 years |
| David Ernest Palmer | Director | 8 Apr 1994 | 20 Aug 1995 | British | 91 years |
| Denise Ann Bower Obe | Director | 1 Jan 2022 | 31 Dec 2023 | British | 58 years |
| Diana Zivko | Secretary | 12 Jan 2018 | 31 Jul 2022 | - | - |
| Diana Zivko | Secretary | 16 Jun 2023 | 2 Aug 2024 | - | - |
| Guy William Ingledew Leonard | Director | 29 Nov 2007 | 31 Dec 2020 | British | 71 years |
| Ian Haslett Elliott | Director | 9 May 1991 | 30 Apr 1992 | British | 86 years |
| Ian Martin Richard Galbraith | Director | 1 Mar 2018 | 30 Sept 2025 | British | 63 years |
| Joanna Maria Field | Secretary | 27 Jan 2015 | 31 Mar 2017 | - | - |
| John Charles Anthony Porter | Secretary | 1 Aug 2022 | 15 Jun 2023 | - | - |
| John Desmond Hayward | Director | 9 May 1991 | 30 Apr 1992 | British | 86 years |
| John Frederick Robson | Director | 9 May 1991 | 30 Apr 1992 | British | 94 years |
| John Macarthur Whitefield | Director | 9 May 1991 | 30 Apr 1992 | British | 94 years |
| Keith John Howells | Director | 16 Dec 2003 | 30 Jun 2019 | British | 73 years |
| Kevin John Stovell | Director | 11 Dec 2002 | 27 Nov 2015 | British | 74 years |
| Kevin Paul Dixon | Director | 29 Nov 2007 | 31 Mar 2016 | British | 73 years |
| Marjorie Eva Lynn | Secretary | 31 May 2014 | 27 Jan 2015 | British | - |
| Martin James Grigor | Secretary | 9 May 1991 | 1 Dec 1994 | British | - |
| Martin Stevenson Crosbie Frame | Director | 14 May 2002 | 29 Apr 2005 | British | 81 years |
| Masood Husain Khan | Director | 9 May 1991 | 30 Apr 1992 | British | 90 years |
| Masood Husain Khan | Director | 8 Apr 1994 | 31 Mar 1996 | British | 90 years |
| Michael David Haigh | Director | 27 Nov 2015 | 31 Jul 2022 | British | 66 years |
| Michael Edwin George | Director | 9 May 1991 | 30 Apr 1992 | British | 83 years |
| Michael Orlando Blackburn | Director | 23 Sept 1999 | 18 Oct 2007 | British | 81 years |
| Peter John Lamb | Director | 9 May 1991 | 30 Apr 1992 | British | 88 years |
| Peter John Wickens | Director | 29 Jul 2005 | 31 Dec 2010 | British | 76 years |
| Peter Michael Chesworth | Director | 9 May 1991 | 5 Aug 2005 | British | 81 years |
| Peter Stuart Lee | Director | 9 May 1991 | 30 Apr 1992 | British | 81 years |
| Peter Stuart Lee | Director | 8 Apr 1994 | 1 Aug 2000 | British | 81 years |
| Philip Charles Gregory | Secretary | 15 Mar 1996 | 31 May 2014 | British | - |
| Reginald Thomas Masters | Director | 9 May 1991 | 30 Apr 1992 | British | 94 years |
| Richard Williams | Director | 29 Nov 2007 | 31 Mar 2015 | British | 71 years |
| Robert Beresford | Director | 9 May 1991 | 20 Nov 1998 | British | 88 years |
| Robert Douglas Hilton Twigg | Director | 9 May 1991 | 30 Apr 1992 | British | 82 years |
| Robert Douglas Hilton Twigg | Director | 1 Aug 2000 | 30 Nov 2002 | British | 82 years |
| Robin Bretten Fox | Director | 9 May 1991 | 10 May 2002 | British | 83 years |
| Timothy John Thirlwall | Director | 9 May 1991 | 4 Dec 2003 | British | 83 years |
| William Gregor Desson | Secretary | 1 Dec 1994 | 15 Mar 1996 | British | - |
| William James Rankin | Director | 26 Jan 2007 | 30 Jun 2010 | British | 77 years |