| Alison Scillitoe White | Secretary | 11 Feb 1999 | 1 Nov 2001 | British | - |
| Andrew Lee Milner | Director | 6 Feb 2013 | 12 Dec 2019 | British | 57 years |
| Ann Elizabeth Mantz | Secretary | 23 Dec 1991 | 11 Feb 1999 | British | - |
| Brian Lynn Staples | Director | 20 Jan 1999 | 28 Feb 2003 | British | 81 years |
| Carol Hui | Secretary | 1 Nov 2001 | 30 Nov 2005 | British | - |
| Christopher Charles Webster | Director | 10 Mar 2005 | 11 Apr 2010 | British | 68 years |
| Christopher Victor Fenton | Director | 13 Jul 2010 | 31 Oct 2012 | British | 64 years |
| David Alwyn Cawthorne | Director | 30 Apr 1991 | 1 Mar 1997 | British | 82 years |
| David Alwyn Cawthorne | Secretary | 30 Apr 1991 | 23 Dec 1991 | British | - |
| David John Miller | Director | 20 Jan 1999 | 10 Sept 2002 | British | 64 years |
| Edmund Alec King | Director | 30 Apr 1991 | 31 Dec 1996 | British | 90 years |
| Gerard Joseph Mccormack | Director | 1 Mar 1997 | 23 Oct 1998 | British | 74 years |
| John Anthony Lynch | Director | 30 Apr 1991 | 20 Dec 1991 | British | 71 years |
| John Watson Teasdale Snowdon | Director | 30 Apr 1991 | 10 Mar 2005 | British | 78 years |
| Jose Leo | Director | 3 Sept 2003 | 22 Sept 2006 | Spanish | 66 years |
| Kevin John Bailey | Director | 1 Mar 1993 | 20 Dec 2001 | British | 65 years |
| Melvyn Ewell | Director | 20 Dec 2001 | 31 Mar 2016 | British | 68 years |
| Michael Arthur Kayser | Director | 11 Sept 2002 | 15 Oct 2002 | British | 71 years |
| Michael Pilbeam | Director | 19 Mar 1999 | 28 Feb 2001 | British | 77 years |
| Nicola Ruth Hindle | Director | 19 Feb 2016 | 31 Jan 2020 | British | 50 years |
| Richard William Entwistle | Director | 4 Jan 2000 | 20 Dec 2001 | British | 73 years |
| Richard William Entwistle | Director | 28 Feb 2003 | 30 Jun 2005 | British | 73 years |
| Robert Charles Clapperton | Director | 30 Apr 1991 | 1 Jan 1996 | British | 77 years |
| Roger Fredrick Venthen | Director | 18 Jan 1999 | 20 Dec 2001 | British | 81 years |
| Stephen John Helliwell | Director | 10 Mar 2005 | 7 May 2010 | British | 61 years |
| Stephen John Withers | Director | 12 Jul 2010 | 6 Feb 2013 | British | 68 years |
| Steven John Prentice | Director | 30 Oct 1996 | 20 Dec 2001 | British | 69 years |
| William Anthony Lucas | Director | 28 Jan 1992 | 1 Jan 1996 | British | 85 years |
| William Anthony Lucas | Director | 13 May 1996 | 31 Jan 2000 | British | 85 years |
| William Lloyd | Director | 15 Jan 1997 | 20 Dec 2001 | British | 79 years |