| Alan Leonard Whitnall | Secretary | 24 Nov 1998 | 29 May 2009 | British | - |
| Andrew Christopher Pitt | Director | 23 Oct 2009 | 2 Jan 2012 | British | 67 years |
| Andrew Jacques Levy | Director | 11 Apr 2011 | 30 Jun 2019 | British | 63 years |
| Danny Elford | Director | 16 May 2022 | 28 Apr 2023 | British | 59 years |
| Graham Charles Eccles | Director | 24 Jul 2001 | 30 Sept 2005 | British | 80 years |
| Iain Maury Campbell Meiklejohn | Nominee Director | 14 Oct 1998 | 24 Nov 1998 | British | 72 years |
| Iain Maury Campbell Meiklejohn | Nominee Secretary | 14 Oct 1998 | 24 Nov 1998 | British | - |
| Ian Ralph Dobbs | Director | 30 Sept 2005 | 28 Feb 2009 | British Australian | 72 years |
| James Robert Will | Nominee Director | 14 Oct 1998 | 24 Nov 1998 | British | 71 years |
| Keith Robertson Cochrane | Director | 24 Nov 1998 | 21 Jul 2002 | British | 61 years |
| Martin Andrew Griffiths | Director | 24 Nov 1998 | 8 Jan 2021 | British | 60 years |
| Michael John Vaux | Secretary | 29 May 2009 | 30 Jul 2024 | British | - |
| Neil Micklethwaite | Director | 31 May 2019 | 30 Jun 2022 | British | 53 years |
| Nicholas Leigh Guest | Director | 19 Nov 2002 | 12 Sept 2007 | British | 60 years |
| Nicola Susan Mary Salmond | Director | 1 Sept 2004 | 12 Feb 2010 | British | 50 years |
| Robert Arthur Benns | Director | 27 Jul 2011 | 16 Sept 2016 | British | 58 years |
| Ross John Paterson | Director | 19 Nov 2002 | 1 Sept 2004 | British | 55 years |
| Ross John Paterson | Director | 11 Apr 2011 | 11 Apr 2011 | British | 55 years |
| Ross John Paterson | Director | 27 Jul 2011 | 8 Jan 2021 | British | 55 years |
| Timothy Colin Shoveller | Director | 23 Oct 2009 | 31 May 2019 | British | 54 years |