| Anthony Douglas Roche | Director | 13 Nov 1995 | 17 Nov 1995 | British | 83 years |
| David Garth Griffin-smith | Director | 24 May 1995 | 22 Mar 1996 | British | 81 years |
| David Phillip Curtis | Director | 21 Mar 1996 | 3 Oct 2011 | British | 77 years |
| David Rollin | Director | 21 Mar 1996 | 2 Mar 2013 | British | 82 years |
| Elizabeth Ann Kathleen Stewart | Director | 1 Aug 2019 | 31 Dec 2021 | British | 45 years |
| George Ernest Marchant | Director | 26 May 1995 | 22 Mar 1996 | British | 83 years |
| James Alexander Burke | Director | 3 Oct 2011 | 12 Sept 2014 | Canadian | 71 years |
| Johannes Cornelis Kuiken | Director | 3 Oct 2011 | 31 Dec 2018 | Dutch | 77 years |
| Jonathan James Wragg | Director | 21 Mar 1996 | 28 Sept 2018 | British | 63 years |
| Michael John Grace | Director | 16 Dec 2016 | 29 Oct 2021 | British | 63 years |
| Neil Francis Wilson | Director | 21 Mar 1996 | 3 Oct 2011 | British | 77 years |
| Peter Graham Hewett | Director | 24 May 1995 | 22 Mar 1996 | British | 78 years |
| Peter Graham Hewett | Secretary | 24 May 1995 | 22 Mar 1996 | British | - |
| Peter James Howarth | Director | 17 May 2005 | 3 Oct 2011 | British | 85 years |
| Peter Martin Dudley | Director | 28 Sept 1998 | 3 Oct 2011 | British | 65 years |
| Richard Paul Tapping | Director | 21 Mar 1996 | 3 Oct 2011 | British | 61 years |
| Richard Paul Tapping | Director | 12 Sept 2014 | 16 Dec 2016 | British | 61 years |
| Richard Paul Tapping | Secretary | 21 Mar 1996 | 16 Dec 2016 | British | - |
| Richard Thomas Glandon George | Director | 22 Mar 2013 | 31 Jul 2019 | British | 71 years |
| Simon Glenister Cole | Director | 1 Aug 2019 | 9 Apr 2024 | British | 57 years |
| Thomas Ostle Monkhouse | Director | 26 May 1995 | 22 Mar 1996 | British | 88 years |
| Thomas Peter Meacock | Director | 1 Jan 2022 | 17 May 2023 | British | 48 years |