| Alan Edward Wheatley | Director | 1 Jan 1993 | 26 Jul 2002 | British | 88 years |
| Albert Norman Dungate | Secretary | 1 Feb 2002 | 31 Mar 2016 | British | - |
| Allan Keppie Smith | Director | 12 Jul 1992 | 10 Nov 1993 | British | 94 years |
| Anna Marie Stewart | Director | 1 Nov 2012 | 6 Oct 2017 | British | 62 years |
| Archibald Anderson Bethel | Director | 1 May 2010 | 14 Sept 2020 | British | 73 years |
| David Bruce Omand | Director | 1 Apr 2009 | 31 Mar 2021 | British | 79 years |
| Dipesh Jayantilal Shah | Director | 15 Jun 1999 | 9 Jul 2009 | British | 73 years |
| Erik Alexander Steven Porter | Director | 12 Jul 1992 | 30 Jul 1997 | British | 87 years |
| Francis Ross Gibb | Director | 12 Jul 1992 | 30 Jul 1997 | British | 99 years |
| Franco Martinelli | Director | 1 Aug 2014 | 30 Nov 2020 | British | 66 years |
| Gernot Schafer | Director | 31 Jul 1997 | 31 Dec 2002 | German | 87 years |
| Godfrey Oliver Whitehead | Director | 12 Jul 1992 | 30 Apr 1993 | British | 85 years |
| Gordon Arden Campbell | Director | 10 Oct 2000 | 31 Oct 2008 | British | 80 years |
| Helen Margaret Mahy | Secretary | 1 Feb 1999 | 31 Jan 2002 | British | - |
| Ian Barnet Duncan | Director | 10 Nov 2010 | 4 Aug 2020 | British | 65 years |
| Ian Guy Stewart Hartigan | Director | 1 Oct 1994 | 30 Jul 1999 | British | 93 years |
| Jeff William Randall | Director | 1 Apr 2014 | 4 Aug 2020 | British | 72 years |
| Jeffrey Whalley | Director | 12 Jul 1992 | 27 Jul 1995 | British | 84 years |
| John Allen | Secretary | 12 Jul 1992 | 31 Jan 1999 | British | - |
| John Herbert Lace | Director | 12 Jul 1992 | 30 Sept 1993 | British | 92 years |
| John Leonard King Of Wartnaby | Director | 12 Jul 1992 | 21 Jul 1994 | British | 109 years |
| John Leonard Rennocks | Director | 13 Jun 2002 | 31 Dec 2011 | British | 81 years |
| John Richard Davies | Director | 1 Jan 2013 | 31 Mar 2020 | British | 63 years |
| John Russell Houlden | Director | 1 Apr 2020 | 31 Jul 2022 | British | 67 years |
| Justin Nicholas Aidan Crookenden | Director | 1 Dec 2005 | 30 Nov 2014 | British | 63 years |
| Kate Elizabeth Swann | Director | 1 Jun 2011 | 31 Dec 2015 | British | 62 years |
| Kevin Richard Thomas | Director | 1 May 2010 | 31 Dec 2015 | British | 72 years |
| Kjersti Wiklund | Director | 1 Apr 2018 | 26 Sept 2022 | Norwegian | 64 years |
| Lucy Rebecca Dimes | Director | 1 Apr 2018 | 25 Sept 2025 | British | 60 years |
| Michael John Turner | Director | 5 Jun 1996 | 31 Dec 2005 | British | 78 years |
| Michael John Turner | Director | 1 Jun 2008 | 18 Jul 2019 | British | 78 years |
| Murray Simpson Easton | Director | 31 Jul 1997 | 31 May 2002 | British | 75 years |
| Myles Peter Lee | Director | 1 Apr 2015 | 22 Sept 2021 | Irish | 73 years |
| Nicholas Robin Salmon | Director | 4 Oct 1993 | 31 May 1997 | British | 74 years |
| Nigel Richard Essenhigh | Director | 4 Mar 2003 | 31 Dec 2012 | British | 82 years |
| Nigel Robert Young | Director | 31 Jul 1997 | 30 Nov 2001 | British | 73 years |
| Peter Lloyd Rogers | Director | 13 Jun 2002 | 31 Aug 2016 | British | 79 years |
| Thomas Alexander Hesketh | Director | 6 Oct 1993 | 8 Nov 2010 | British | 76 years |
| Thomas John Parker | Director | 4 Oct 1993 | 31 Dec 2000 | British | 84 years |
| Victoire Anne Marie De Margerie | Director | 1 Feb 2016 | 22 Sept 2021 | French | 63 years |
| William Tame | Director | 25 Jan 2002 | 31 Mar 2018 | British | 72 years |