| Brian Donald Dougherty | Director | 1 Jun 1998 | 31 Jul 2001 | British | 71 years |
| Brian Donald Dougherty | Secretary | 29 Jan 1999 | 31 Jul 2001 | British | - |
| Clare Pickering | Director | 1 Mar 2018 | 25 Apr 2025 | British | 56 years |
| Daphne Margaret Murray | Secretary | 5 May 2004 | 30 Jun 2018 | British | - |
| David Sidney Neave | Director | 12 Feb 2003 | 5 May 2004 | British | 77 years |
| Donald Gilmour Sutherland | Director | 18 Sept 1995 | 31 May 2001 | British | 86 years |
| Emma Jayne Ashenden | Secretary | 25 Jan 2021 | 2 Feb 2023 | - | - |
| Graeme Russell Nicolson | Director | 15 Sept 1989 | 31 Jul 2001 | British | 73 years |
| Graham George Hepburn | Director | 5 May 2004 | 23 Sept 2005 | British | 73 years |
| Iain James Macdonald Haldane | Director | 12 Feb 2003 | 7 Oct 2006 | British | 67 years |
| James Blyth | Director | 31 May 1990 | 3 Apr 2000 | British | 97 years |
| Jason Alexander Smalley | Director | 5 Nov 2012 | 22 Oct 2016 | British | 57 years |
| John Anthony Robinson | Director | 22 Jun 2001 | 1 Apr 2004 | British | 78 years |
| Joseph Mcgrane | Director | 23 May 2000 | 31 May 2001 | British | 72 years |
| Larry Jose Zea Betancourt | Director | 23 Mar 2015 | 1 Oct 2019 | Venezuelan | 65 years |
| Michael George Foster | Director | 22 Jun 2001 | 12 Feb 2003 | British | 73 years |
| Michael Leslie Collins | Director | 1 Apr 2004 | 23 Mar 2015 | British | 70 years |
| Michael Leslie Collins | Secretary | 31 Jul 2001 | 5 May 2004 | British | - |
| Paul George Rosie | Director | 1 Apr 1993 | 12 Feb 2003 | British | 72 years |
| Paul George Rosie | Director | 7 Oct 2006 | 31 Dec 2015 | British | 72 years |
| Rebecca Juliet Wright | Secretary | 30 Jun 2018 | 25 Jan 2021 | - | - |
| Ronald Davidson | Secretary | 15 Sept 1989 | 29 Aug 1997 | British | - |
| Ross Alexander Belch | Director | 15 Sept 1989 | 29 Jan 1999 | British | 86 years |
| Ross Alexander Belch | Secretary | 29 Aug 1997 | 29 Jan 1999 | British | - |
| Stanley Russell Nicolson | Director | 15 Sept 1989 | 15 May 1996 | British | 103 years |
| Stewart Fraser Mccoll | Director | 15 Sept 1989 | 31 Jul 2001 | British | 79 years |