| Allan Geoffrey Wilkinson | Director | 24 Feb 1998 | 31 Dec 2002 | British | 72 years |
| Alton Russell Miller | Director | 30 Sept 1992 | 30 Sept 2003 | British | 86 years |
| Andrew Michael Crossley | Director | 4 Jul 2007 | 30 Jun 2014 | British | 70 years |
| Bernard Jan Abrahamsen | Director | 1 Feb 2009 | 15 May 2015 | Dutch | 61 years |
| Claire Alex Bullen | Director | 5 Jul 1993 | 17 Jan 1996 | British | 57 years |
| Claire Anne Bews | Director | 17 Sept 2015 | 27 May 2021 | British | 50 years |
| Claire Brown | Director | 19 Jan 2022 | 26 Jun 2023 | British | 47 years |
| David Burdett Money-coutts | Director | 30 Sept 1992 | 22 Jan 1997 | British | 95 years |
| David Gareth Jones | Director | 4 Jul 2007 | 9 Jun 2017 | British | 60 years |
| David Kenneth Watson | Director | 24 Mar 1997 | 28 Feb 2003 | British | 67 years |
| David Leslie Morgan | Director | 22 Jun 1994 | 27 May 1998 | British | 93 years |
| Dennis Ian Shaw | Director | 30 Sept 1992 | 31 Mar 1993 | British | 90 years |
| Fiona Jane Molloy | Secretary | 5 Sept 2001 | 13 Jan 2006 | British | - |
| Gary Nicholas Cotton | Director | 6 Jun 2012 | 9 Jun 2017 | British | 57 years |
| Gary Paul John Shaughnessy | Director | 6 Sept 2005 | 18 May 2007 | British | 60 years |
| Georgina Anne Clarke | Director | 18 Apr 2013 | 18 Apr 2021 | British | 47 years |
| Georgina Martin Turnbull | Director | 2 Oct 2014 | 10 Jan 2020 | British | 54 years |
| Gillian Starkie | Director | 25 Nov 2020 | 30 Sept 2021 | British | 48 years |
| Hannah Mary Dawson | Director | 13 Jun 1996 | 23 Feb 1998 | British | 58 years |
| Harold John Haden | Director | 30 Sept 1992 | 24 Mar 1997 | British | 85 years |
| Hillary Jane Tyler | Director | 1 Oct 2003 | 27 Feb 2009 | British | 61 years |
| James Michael Brennan Alexander | Director | 1 May 2009 | 28 May 2015 | British | 66 years |
| Julian Christopher Gell | Director | 17 Jan 2001 | 31 May 2007 | British | 75 years |
| Kerryn Lynn Macdonald | Secretary | 30 Apr 2004 | 9 Mar 2005 | British | - |
| Laurence Edward Linaker | Director | 30 Sept 1992 | 22 Jun 1994 | British | 92 years |
| Leslie John Scrine | Director | 25 Aug 1998 | 31 Dec 2020 | British | 68 years |
| Malcolm David Philip Richardson | Director | 1 Oct 2020 | 30 Apr 2025 | British | 63 years |
| Martin James Firstbrook | Director | 20 Jun 2017 | 26 Jun 2018 | British | 50 years |
| Michael George Alexander Mclintock | Director | 22 Jan 1997 | 17 Jan 2001 | British | 65 years |
| Michael John Sullivan | Director | 25 May 2018 | 12 May 2020 | British | 59 years |
| Philip Barraclough | Director | 17 Sept 2015 | 31 Mar 2018 | British | 53 years |
| Philip Michael Johnson | Director | 1 Mar 2003 | 6 Sept 2005 | British | 55 years |
| Raymond Barry Rendell | Director | 1 Jan 2003 | 1 Feb 2009 | British | 75 years |
| Sanjeev Sharma | Director | 30 Jul 2018 | 9 Jan 2022 | British | 63 years |
| Simon Douglas Bailey | Director | 20 Jun 2017 | 9 Aug 2018 | British | 51 years |
| Terrence Stanley Smith | Secretary | 30 Sept 1992 | 5 Sept 2001 | British | - |
| Zubair Mohammed | Director | 10 Jan 2022 | 25 Mar 2022 | British | 52 years |