| Alison Jane Henriksen | Director | 29 Jan 2020 | 31 Jul 2025 | Australian,british | 58 years |
| Andrew Robert Thompson | Director | 28 Feb 2013 | 15 Jul 2024 | British | 49 years |
| Cara Crichton | Secretary | 12 Apr 2013 | 29 Jan 2020 | - | - |
| Christopher John Vickers | Secretary | 10 Dec 2002 | 22 Jul 2004 | British | - |
| David Patrick John Crosby | Director | 12 Mar 2008 | 18 Apr 2014 | British | 60 years |
| David Peter Timmins | Director | 29 Mar 2004 | 2 Apr 2007 | British | 73 years |
| David Peter Timmins | Secretary | 22 Jul 2004 | 12 Jun 2006 | British | - |
| David William Wrigley | Director | 27 Nov 1991 | 21 Jul 1995 | British | 92 years |
| Francis Hall | Secretary | 1 Apr 2001 | 10 Dec 2002 | British | - |
| George Mason Pye | Secretary | 27 Nov 1991 | 13 Nov 1997 | British | - |
| Hugh James Ratcliffe | Director | 25 Sept 2024 | 1 Feb 2025 | British | 44 years |
| Ian Biggs | Director | 18 May 2010 | 1 Jan 2012 | British | 67 years |
| Ian Brian Farrelly | Secretary | 12 Jun 2006 | 12 Apr 2013 | British | - |
| Janet Ann Duane | Director | 18 Apr 2014 | 26 May 2022 | Irish | 53 years |
| John Alexander Menmuir Watt | Director | 27 Nov 1991 | 13 Nov 1997 | British | 90 years |
| John Armitage Pye | Director | 27 Nov 1991 | 13 Nov 1997 | British | 100 years |
| John Graham Worby | Director | 18 Feb 2009 | 1 Mar 2013 | British | 75 years |
| Jonathan Lester | Director | 1 Feb 2025 | 10 Jun 2025 | British | 45 years |
| Joseph Glyn Thomas | Director | 27 Nov 1991 | 13 Nov 1997 | British | 88 years |
| Karim Bitar | Director | 30 Sept 2011 | 13 Sept 2019 | American | 60 years |
| Lawrence David Fairall | Secretary | 13 Nov 1997 | 31 Mar 2001 | British | - |
| Martin Brett Boden | Director | 2 Apr 2007 | 26 Feb 2009 | British | 66 years |
| Michael Roy David Roller | Director | 17 Mar 2003 | 6 Aug 2003 | British | 60 years |
| Richard Kenneth Wood | Director | 5 Aug 1999 | 30 Sept 2011 | British | 81 years |
| Robert James Holliday | Director | 12 Mar 2008 | 31 Jul 2012 | British | 70 years |
| Stephen David Wilson | Director | 1 Mar 2013 | 7 Aug 2023 | British | 66 years |
| Stephen John Amies | Director | 2 Mar 2000 | 1 Apr 2010 | British | 75 years |
| Stewart Alexander Rankin Proctor Crichton | Director | 12 Mar 2008 | 15 May 2013 | British | 74 years |
| Stuart Alexander Maclennan | Director | 18 Dec 2012 | 4 Apr 2014 | British | 54 years |
| Thomas John Kelly | Director | 13 Nov 1997 | 20 Feb 2000 | British | 85 years |
| Thomas Philip Acton | Director | 13 Nov 1997 | 17 Mar 2003 | British | 67 years |
| Thomas Philip Acton | Director | 12 Mar 2008 | 17 Feb 2012 | British | 67 years |