| Alice Josephine Kirby | Director | 23 Oct 2003 | 30 Jun 2004 | British | 67 years |
| Andrew Michael Haigh | Director | 25 Nov 2002 | 25 May 2012 | British | 67 years |
| Andrew Richard Kyle | Director | 19 Mar 2019 | 1 Aug 2023 | British | 45 years |
| Annabelle Katy Arber | Secretary | 1 Feb 2019 | 11 Mar 2020 | - | - |
| Anthony Hugo Corin | Director | 30 Nov 1995 | 29 Mar 1997 | British | 80 years |
| Anthony Richard Butler | Director | 18 Jan 1994 | 30 Nov 2002 | British | 74 years |
| Brian Martin Mulholland | Director | 1 Jul 2015 | 22 Aug 2016 | British | 51 years |
| Christopher Malcolm Horne | Director | 2 May 1992 | 27 Sept 1996 | British | 84 years |
| David Burdett Money-coutts | Director | 2 May 1992 | 30 Sept 1993 | British | 94 years |
| Duncan Robert White | Director | 6 Jan 2003 | 19 Sept 2003 | British | 73 years |
| Dylan Lee Williams | Director | 27 Jan 2012 | 6 Nov 2019 | British | 52 years |
| Edward George Colyer | Director | 25 Nov 2002 | 30 Jun 2004 | British | 58 years |
| Fiona Mary Mackay | Secretary | 12 Sept 2016 | 31 Jan 2019 | - | - |
| Gavin Christopher Frost | Director | 21 Feb 2011 | 31 Dec 2013 | British | 52 years |
| Gloria Jayne Glennie | Secretary | 29 Sept 1998 | 1 Jun 1999 | British | - |
| Ian Ross Farnsworth | Director | 2 May 1992 | 30 Jun 1995 | British | 87 years |
| Ian Stuart Lay | Director | 8 Nov 1999 | 30 Jun 2004 | British | 63 years |
| James Antony Clarry | Director | 23 Nov 2015 | 6 Nov 2019 | British | 51 years |
| James Hedley Rawlingson | Director | 8 May 2007 | 22 Feb 2011 | British | 58 years |
| Kate Macdonald Turner | Director | 11 Aug 2004 | 16 Dec 2011 | English | 61 years |
| Kelvin George Cromwell | Director | 1 Dec 2000 | 31 Dec 2002 | British | 74 years |
| Mark Hilton | Director | 12 Jun 1997 | 8 Nov 1999 | British | 64 years |
| Michael John Morley | Director | 25 May 2012 | 21 Mar 2016 | British | 68 years |
| Michael Robert Regan | Director | 1 Sept 2016 | 31 Jan 2019 | British | 46 years |
| Mohammad Kamal Syed | Director | 27 Jul 2023 | 8 Jul 2024 | British | 62 years |
| Nicholas Assheton | Director | 30 Sept 1993 | 23 May 1999 | British | 91 years |
| Nicholas David Stanley Gornall | Director | 2 Nov 2009 | 27 Jan 2012 | British | 62 years |
| Nigel Desmond Carter | Director | 30 Jun 2004 | 31 Jul 2009 | British | 60 years |
| Paul Alfred Smith | Director | 27 Jan 2012 | 7 Aug 2015 | British | 64 years |
| Peregrine Aidan Eldon Littleboy | Director | 30 Jun 2004 | 1 Oct 2008 | British | 64 years |
| Peter Gordon Flavel | Director | 6 Nov 2019 | 27 Jul 2023 | Australian | 65 years |
| Ralph Antoine Ricks | Secretary | 11 Mar 2020 | 19 Mar 2021 | - | - |
| Robert Bruce Taylor | Director | 30 Jun 2004 | 14 Jul 2004 | British | 65 years |
| Robert Earl Stemmons | Director | 9 Sept 1996 | 1 Dec 2000 | Usa | 65 years |
| Ruth Nicholson | Secretary | 1 Jun 1999 | 13 Mar 2000 | British | - |
| Sally Anne Doyle | Secretary | 13 Mar 2000 | 12 Sept 2016 | British | - |
| Samantha Helen Linsley | Secretary | 9 Sept 1996 | 30 Sept 1998 | British | - |
| Siobhan Geraldine Boylan | Director | 1 Sept 2023 | 18 Jul 2025 | Irish | 56 years |
| Stephen John Fletcher | Director | 1 Oct 2008 | 14 Jul 2015 | British | 64 years |
| Stuart Henry Wells | Director | 2 May 1992 | 17 Jan 1994 | British | 85 years |
| Stuart William Newey | Director | 3 Mar 2014 | 6 Nov 2019 | British | 61 years |
| Timothy John Lewis | Secretary | 2 May 1992 | 9 Sept 1996 | British | - |