| Adam David Brian Machin | Director | 25 Mar 2019 | 27 Mar 2019 | British | 54 years |
| Alan George Scott | Director | 7 Jul 1995 | 14 Jul 1995 | British | 76 years |
| Alan George Scott | Director | 6 Sept 2005 | 30 Mar 2009 | British | 76 years |
| Alberto Buffa | Director | 18 May 2015 | 9 Dec 2016 | Italian | 41 years |
| Andrew William Longden | Director | 28 Jul 1995 | 21 Aug 1995 | British | 69 years |
| Andrew William Longden | Director | 28 Jul 1995 | 24 Oct 2003 | British | 69 years |
| Antony John Gara | Director | 23 Mar 2020 | 11 Jun 2020 | British | 52 years |
| Carol Gear | Secretary | 16 Nov 1992 | 17 Feb 1995 | British | - |
| Christina Bridget Ryan | Director | 14 Oct 2013 | 31 Mar 2025 | Irish | 66 years |
| Colleen Jones | Director | 14 Aug 1998 | 31 Aug 1998 | British | 60 years |
| David Scriven | Director | 27 Feb 1996 | 1 Mar 1996 | British | 68 years |
| David Scriven | Director | 8 Oct 1996 | 11 Nov 1996 | British | 68 years |
| David Scriven | Director | 26 May 1997 | 9 Jun 1997 | British | 68 years |
| Glyn Parry | Director | 30 Jun 2007 | 4 Dec 2018 | British | 59 years |
| Helen Louise Ashton | Director | 30 Mar 2009 | 31 Dec 2010 | British | 64 years |
| Helen Louise Ashton | Director | 11 Nov 2010 | 31 Dec 2010 | British | 64 years |
| John Arthur Kevin Clark | Director | N/A | 21 May 2001 | British | 73 years |
| John Vincent Wroe | Director | 8 May 2007 | 30 Jun 2007 | British | 68 years |
| John William Alfred Fox | Director | 21 May 2001 | 8 May 2007 | British | 69 years |
| Katherine Ann Walker | Director | 17 Aug 1998 | 31 Aug 1998 | British | 75 years |
| Katherine Mary Duffy | Director | 2 Jun 1997 | 9 Jun 1997 | British | 81 years |
| Katherine Mary Duffy | Secretary | 16 Nov 1992 | 17 Feb 1998 | British | - |
| Leslie Charles Winnister | Director | 23 Dec 2002 | 8 Jan 2003 | British | 74 years |
| Leslie Charles Winnister | Director | 25 Oct 2003 | 7 Nov 2019 | British | 74 years |
| Louise Alison Clare Blackwell | Director | 9 Dec 2010 | 14 Oct 2013 | British | 44 years |
| Louise Alison Clare Blackwell | Director | 16 May 2016 | 18 Jan 2018 | British | 44 years |
| Michael Alexander Schraer | Director | 22 Dec 1998 | 8 May 2002 | British | 71 years |
| Michael John Cole | Director | 14 Oct 2013 | 28 Feb 2014 | British | 56 years |
| Nicola Brenchley | Director | 2 Oct 2019 | 19 Jun 2023 | British | 58 years |
| Paula Annette Walsh | Secretary | 2 Aug 1995 | 13 Jun 2000 | British | - |
| Philip Norman Allenby | Director | 9 Dec 2010 | 18 May 2015 | British | 66 years |
| Richard William Savage | Director | 16 Nov 1992 | 22 Dec 1998 | British | 76 years |
| Robert John Harwood | Secretary | 17 Feb 1998 | 13 Jun 2000 | British | - |
| Simon Douglas Coward | Director | 2 Aug 1995 | 14 Aug 1995 | British | 66 years |
| Stephen John Prior | Director | 16 Nov 1992 | 6 Sept 2005 | British | 73 years |