| Alan Paul Busson | Secretary | 3 Apr 2006 | 29 Sept 2006 | British | - |
| Alfred Michael Heath | Director | 1 May 1992 | 14 Dec 1992 | British | 90 years |
| Amanda Louise Knott | Secretary | 29 Sept 2006 | 22 May 2013 | British | - |
| Andrew Mark Smith | Director | 1 Oct 1998 | 21 Dec 2006 | British | 68 years |
| Andrew Stephen Melcher | Director | 1 May 1992 | 1 Mar 1997 | U S | 77 years |
| Andrew Wallace | Director | 1 Mar 1997 | 12 Jan 1999 | British | 77 years |
| Ann Claire Blundell | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| Brian Paul Hanks | Director | 1 Oct 1998 | 28 Sept 2001 | British | 68 years |
| Charlotte Denise Murphy | Director | 1 May 2018 | 28 Mar 2022 | British | 44 years |
| Clive Frederick Coates | Director | 1 May 1992 | 31 Dec 1997 | British | 82 years |
| Colin Edward Parker | Director | 1 May 1992 | 14 Dec 1992 | British | 91 years |
| Corina Katherine Ross | Secretary | 4 Feb 2011 | 22 May 2013 | British | - |
| David Philip Allvey | Director | 1 May 1992 | 14 Dec 1992 | British | 81 years |
| David Ross Carrie | Director | 13 Mar 2001 | 31 Dec 2005 | United Kingdom | 62 years |
| Dennis William White | Director | 1 Oct 1998 | 28 Dec 2000 | British | 85 years |
| Derek Richard Woodward | Secretary | 31 May 1999 | 31 Aug 2001 | British | - |
| Donald Ian Hope | Director | 28 Oct 1993 | 1 Mar 1997 | Uk And New Zealand | 70 years |
| Graham Henry Lockwood | Director | 1 May 1992 | 28 Oct 1993 | British | 91 years |
| Helen Frances Leigh Rogers | Secretary | 14 Jul 2008 | 2 Dec 2011 | British | - |
| Ian Graham Seward | Director | 1 Mar 1997 | 28 Dec 2000 | British | 79 years |
| Ian Humphries James | Director | 8 Mar 1993 | 1 Oct 1998 | British | 75 years |
| Ian Ritchie | Secretary | 22 May 2013 | 10 Feb 2014 | - | - |
| James Anthony Wiltshire | Secretary | 29 Jun 1992 | 31 May 1999 | British | - |
| James Douglas Sutherland | Director | 28 Jun 2013 | 20 Oct 2017 | British | 52 years |
| Jayne Michelle Meacham | Secretary | 1 Nov 2006 | 2 May 2008 | British | - |
| John Henry Bishop | Director | 14 Dec 1992 | 31 May 1994 | British | 81 years |
| John Marsh | Director | 1 Mar 1997 | 1 Oct 1998 | British | 78 years |
| Jonathan Vaughan-williams | Director | 25 Mar 2014 | 28 Apr 2017 | British | 59 years |
| Joseph Clyde Bradley | Director | 1 May 1992 | 14 Dec 1992 | British | 86 years |
| Lily Olisa Holding | Secretary | 28 Jul 2004 | 27 Apr 2005 | British | - |
| Martin Ewart Jones | Director | 1 Mar 1997 | 1 Oct 1998 | British | 78 years |
| Michael Harris | Director | 13 Mar 2001 | 25 Feb 2005 | British | 61 years |
| Michael John Kirkham Taylor | Director | 13 Mar 2001 | 21 Dec 2006 | British | 69 years |
| Michael Robert Evans | Director | 1 Mar 1997 | 1 Oct 1998 | British | 74 years |
| Neil James Evans | Director | 21 Dec 2006 | 25 Mar 2014 | British | 69 years |
| Nigel Lowe | Director | 21 Dec 2006 | 28 Jun 2013 | British | 74 years |
| Nigel Lowe | Secretary | 27 Apr 2005 | 3 Apr 2006 | British | - |
| Norman Joseph Deryck Ames | Director | 1 Feb 1994 | 30 Dec 1996 | British | 82 years |
| Peter Charles Howe | Secretary | 4 Sept 2001 | 28 Jul 2004 | British | - |
| Robert William Torrance | Director | 31 Dec 1997 | 1 Oct 1998 | Australian | 68 years |
| Shelley Francine Grey | Secretary | 1 May 1992 | 29 Jun 1992 | British | - |
| Terence Stanley Jacombs | Director | 31 May 1994 | 31 Jan 1997 | British | 80 years |
| Timothy James Grant | Director | 30 May 2017 | 22 Aug 2023 | British | 62 years |
| Victoria Louise De Temple | Director | 13 Nov 2017 | 1 May 2018 | British | 48 years |
| Vyvyan James Attwood | Director | 13 Mar 2001 | 31 Dec 2004 | British | 77 years |