| Andrew William Hodges | Director | 4 Jan 2007 | 29 Feb 2016 | British | 59 years |
| Andrew William Hodges | Secretary | 27 Mar 2006 | 29 Feb 2016 | British | - |
| Anthony William Lea | Director | 27 Feb 1992 | 31 Aug 2005 | British | 78 years |
| Chandrika Kumari Kher | Director | 8 Sept 2022 | 18 Aug 2023 | British | 50 years |
| Chandrika Kumari Kher | Director | 9 May 2024 | 15 Aug 2025 | British | 50 years |
| Charles Anthony Wentzel | Secretary | 27 Feb 1992 | 30 Jul 1999 | British | - |
| Christopher Brian Corrin | Director | 11 Feb 2002 | 24 Apr 2015 | British | 73 years |
| Claire Murphy | Director | 12 Nov 2021 | 28 Mar 2025 | Irish | 37 years |
| Clare Louise Peake | Director | 14 May 2021 | 30 Jun 2025 | British | 46 years |
| Craig Darren Fish | Director | 2 Sept 2021 | 1 Aug 2023 | South African | 47 years |
| David Anthony Turner | Director | 15 Oct 1999 | 14 Dec 2001 | British | 74 years |
| Douglas Smailes | Director | 3 Sept 2008 | 31 Jul 2019 | British | 67 years |
| Elaine Klonarides | Director | 20 Apr 2016 | 12 Nov 2021 | British | 50 years |
| Geoffrey Allan Wilkinson | Director | 15 Oct 1999 | 19 Mar 2007 | British | 79 years |
| Geoffrey Allan Wilkinson | Secretary | 30 Jul 1999 | 19 Mar 2007 | British | - |
| John Michael Mills | Director | 17 Nov 2014 | 5 Apr 2018 | British | 62 years |
| John Roger Broughton Phillimore | Director | 27 Feb 1992 | 30 Dec 1992 | British | 77 years |
| Kurt James Burrows | Director | 11 Mar 2024 | 10 Jun 2025 | Australian | 46 years |
| Matthew Thomas Samuel Walker | Director | 27 Feb 2019 | 1 Sept 2021 | British | 45 years |
| Nicholas Jordan | Director | 15 Oct 1999 | 31 Jul 2014 | British | 71 years |
| Peter Charles Desborough Burnell | Director | 17 Feb 1993 | 17 Aug 1999 | British | 85 years |
| Peter Graeme Whitcutt | Director | 15 Oct 1999 | 3 Sept 2008 | South African | 61 years |
| Rene Medori | Director | 31 Aug 2005 | 5 May 2017 | French | 69 years |
| Stephen Thomas Pearce | Director | 14 Jun 2017 | 1 Dec 2023 | Australian | 62 years |
| Timothy Deiniol Walker-jones | Director | 8 Jan 2019 | 17 May 2021 | British | 53 years |
| Timothy Jonathon Wray | Director | 24 Apr 2015 | 31 Jul 2018 | British | 51 years |