| Andrew Christopher Brackfield | Director | 18 Mar 2009 | 31 Dec 2018 | British | 70 years |
| Andrew Christopher Brackfield | Secretary | 20 Jul 2007 | 21 Dec 2007 | British | - |
| Andrew William Hodgkins | Director | 18 Mar 2009 | 28 Sept 2012 | British | 65 years |
| Carol Anne Hunt | Secretary | 12 Feb 1999 | 2 Oct 2006 | British | - |
| David Gordon Pavey | Secretary | 26 Jan 1993 | 2 Dec 1994 | British | - |
| Franklin Daniel Rosenkranz | Director | 26 Jan 1993 | 31 Aug 1999 | British | 81 years |
| George Gordon Wright | Director | 30 Sept 2022 | 31 Mar 2023 | British | 60 years |
| Graham Smith | Director | 26 Jan 1993 | 31 Oct 1997 | British | 74 years |
| Ian Kenneth Hood Baker | Secretary | 2 Dec 1994 | 3 Jul 1995 | British | - |
| Jack Kane | Director | 26 Jan 1993 | 6 Feb 1993 | British | 85 years |
| Jeremy Peter Small | Secretary | 3 Jul 1995 | 12 Feb 1999 | British | - |
| John Mathew Panikar | Director | 16 Jun 2020 | 31 Dec 2020 | American | 58 years |
| Mark Sweeney | Director | 28 Jul 1999 | 30 Sept 2020 | British | 69 years |
| Martin Alistair Gwynn | Director | 13 Nov 1997 | 1 Jul 2020 | British | 62 years |
| Michael Ian Chambers | Director | 18 Mar 2009 | 30 Sept 2023 | British | 59 years |
| Michael Kevin Flynn | Director | 28 Jul 1999 | 31 Aug 2019 | American | 65 years |
| Michael Richard Bousfield | Director | 18 Mar 2009 | 30 Nov 2014 | British | 73 years |
| Nicholas Daniel Hay | Director | 30 Sept 2023 | 31 Mar 2025 | British | 52 years |
| Paul Anthony Davis | Director | 26 Jan 1993 | 29 Aug 1997 | British | 79 years |
| Peter Graham Brinsden | Director | 26 Jan 1993 | 28 Jul 1999 | British | 77 years |
| Sarah Louise Larkins | Secretary | 3 Oct 2006 | 20 Jul 2007 | British | - |
| Sean Dowling Jones | Director | 31 Mar 2025 | 1 Oct 2025 | British | 54 years |
| Simon Alan Bowles | Director | 13 Nov 1997 | 28 Jul 1999 | British | 69 years |
| Susan Kathleen Kelly | Secretary | 21 Dec 2007 | 30 Sept 2022 | British | - |