| Adrian Thomas Grace | Director | 27 Feb 2008 | 16 Jan 2009 | British | 63 years |
| Alistair James Neil Hewitt | Director | 10 Feb 2015 | 31 Oct 2016 | British | 54 years |
| Alistair Linn Webster | Director | 20 Jan 2004 | 30 Jun 2009 | British | 73 years |
| Amy Charlotte Bone | Director | 24 Nov 2016 | 23 Feb 2018 | British | 43 years |
| Andrew Hulme | Director | 23 Feb 2018 | 14 Dec 2021 | British | 46 years |
| Andrew William John Wilson | Director | 2 Jul 2012 | 30 Jun 2014 | British | 57 years |
| Anthony Joseph John Bochenski | Director | 1 Feb 1993 | 30 Nov 2000 | British | 75 years |
| Bruce Smith Anderson | Director | 7 Oct 2014 | 10 Feb 2015 | British | 63 years |
| Carol Ann Ritchie | Director | 1 Apr 2003 | 30 Apr 2004 | British | 67 years |
| Claude Harry Bush | Director | 1 Feb 1993 | 31 Mar 1994 | British | 94 years |
| Edward James Morrison | Director | 20 Jan 2004 | 27 Feb 2008 | British | 74 years |
| George Gibson Reid | Director | 20 Jan 2004 | 4 Jan 2006 | British | 58 years |
| James Owen Trace | Director | 18 Apr 2011 | 12 Mar 2012 | British | 63 years |
| John Alexander Mercer | Director | 1 Feb 1993 | 30 Jun 2000 | British | 87 years |
| John Michael Morrissey | Director | 30 Jun 2009 | 31 Aug 2010 | British | 65 years |
| John Sydney Brown | Director | 1 Feb 1993 | 28 May 1996 | British | 94 years |
| Joseph John Green | Director | 2 Jul 2012 | 30 Jun 2014 | Irish | 48 years |
| Judith Angela Holme | Director | 30 Jun 2009 | 18 Jan 2012 | British | 61 years |
| Julian Alexander Pearce | Director | 12 Mar 2012 | 16 Aug 2013 | British | 58 years |
| Karen Margaret Bothwell | Director | 12 Mar 2012 | 2 Jul 2012 | British | 64 years |
| Martin Kenneth Staples | Director | 4 Jan 2006 | 31 Oct 2006 | British | 53 years |
| Michael John David Griffiths | Director | 18 Apr 2011 | 12 Mar 2012 | British | 77 years |
| Pamela Simone Dickson | Director | 2 Jul 2012 | 1 Jun 2016 | Scottish | 59 years |
| Paul Gittins | Secretary | 1 Jun 2000 | 4 Jun 2012 | British | - |
| Paul Ronayne Harries | Director | 12 Mar 2012 | 29 Jun 2012 | British | 57 years |
| Philip James Han | Director | 1 Apr 2003 | 12 Nov 2003 | British | 64 years |
| Raymond Nixon | Secretary | 1 Feb 1993 | 31 May 2000 | British | - |
| Robert Brown Hare | Director | 29 Jun 2000 | 7 Mar 2005 | British | 66 years |
| Roy Littler | Director | 1 Feb 1993 | 30 Jun 2000 | British | 85 years |
| Steven David Russell Chessman | Director | 27 Aug 2010 | 28 Feb 2011 | British | 63 years |
| Stuart James Ballingall | Director | 15 Jan 2007 | 30 Jun 2009 | British | 62 years |
| William Gordon Barclay | Director | 29 Jun 2000 | 31 Dec 2002 | British | 79 years |