| Alan Duke Brown | Director | 16 Jul 1991 | 18 Apr 1995 | British | 65 years |
| Alan Duke Brown | Director | 13 Aug 2008 | 30 Apr 2018 | British | 65 years |
| Alan Sutherland Moore | Director | 16 Jul 1991 | 14 Jan 1994 | British | 68 years |
| Alan Wood Downie | Director | 18 Apr 1995 | 7 Oct 2004 | British | 75 years |
| Andrew Charles Wagstaff | Director | 22 Jul 2019 | 14 Mar 2025 | English | 54 years |
| Anthony John Kelley | Director | 31 Aug 1991 | 18 Apr 1995 | British | 81 years |
| Catherine Scott Turnbull | Director | 7 Oct 2004 | 25 Mar 2009 | British | 74 years |
| Christopher Douglas Matthews | Director | 6 Jul 2015 | 30 Jun 2016 | British | 71 years |
| Colin Wilkinson | Director | 16 Jul 1991 | 1 Jul 1992 | British | 76 years |
| Damian Francis O'hara | Director | 16 Jul 2004 | 12 Jun 2015 | British | 61 years |
| David Arthur Mann | Director | 16 Jul 2004 | 24 May 2005 | British | 55 years |
| David John Goldring | Director | 11 Aug 1998 | 20 Jan 2006 | British | 76 years |
| Duncan Broe | Director | 1 Jul 1997 | 1 Oct 2004 | British | 63 years |
| Fiona Jury | Director | 16 Jul 2004 | 27 Sept 2005 | British | 53 years |
| Geoffrey Arthur Ball | Director | 16 Jul 1991 | 7 Oct 2004 | British | 82 years |
| Gerald Campbell More | Director | 18 Apr 1995 | 8 Nov 1996 | British | 64 years |
| Gerard Peter Boyle | Director | 16 Jul 1991 | 4 Jun 1996 | British | 76 years |
| Graham Alan Cunningham | Director | 6 Mar 2006 | 1 Aug 2018 | British | 51 years |
| James Christopher Capon | Director | 1 Jul 2023 | 14 Apr 2025 | British | 53 years |
| James Goldring | Director | 19 Nov 2014 | 31 Oct 2019 | British | 48 years |
| Jan Miroslaw Czezowski | Director | 27 Jan 2005 | 29 Jan 2006 | British | 78 years |
| John Allan | Director | 1 Jul 1996 | 30 Jun 2007 | British | 65 years |
| John Graham Gunn Reid | Director | 15 Apr 2002 | 31 Oct 2018 | British | 61 years |
| Jonathan Richard Cook | Director | 21 Jul 2005 | 30 Nov 2014 | British | 57 years |
| Laytons Solicitors | Corporate Secretary | 16 Jul 1991 | 14 Feb 1995 | - | - |
| Ledingham Chalmers Llp | Corporate Secretary | 14 Feb 1995 | 1 Apr 2006 | United Kingdom | - |
| Matthew David Gallagher | Director | 9 May 2005 | 9 May 2005 | British | 52 years |
| Michael John Freshney | Director | 1 Jul 2002 | 30 Jun 2013 | British | 82 years |
| Michael John Whittles | Director | 16 Jul 1991 | 28 Oct 1998 | British | 82 years |
| Neil John Stoddart | Director | 25 Jan 2006 | 1 Sept 2025 | British | 56 years |
| Nicholas Paul Twine | Director | 10 Feb 2014 | 30 Jun 2022 | British | 71 years |
| Pamela Gilchriest | Director | 18 Apr 1995 | 31 Dec 1998 | British | 87 years |
| Philip Francis Christopher Brown | Director | 1 Jul 2003 | 26 Sept 2008 | British | 63 years |
| Richard Michael Potts | Director | 2 Aug 2011 | 13 Nov 2015 | British | 50 years |
| Robert James Millar | Director | 18 Apr 1995 | 7 Oct 2004 | British | 72 years |
| Robert John Westwater Dick | Director | 16 Feb 1996 | 5 Apr 2002 | British | 70 years |
| Robert Westwood | Director | 19 Nov 2014 | 1 Jul 2018 | British | 53 years |
| Robert William Hall | Director | 22 Mar 2016 | 13 Nov 2019 | British | 46 years |
| Sarah Caroline Pasco | Director | 1 Nov 2022 | 30 Nov 2023 | British | 60 years |
| Simon Pierre Collins | Director | 7 Sept 2007 | 26 May 2015 | British | 53 years |
| Simon Robert Boreham | Director | 5 Aug 2015 | 7 Apr 2017 | British | 44 years |
| Stephen Gary Bennett | Director | 8 Aug 2016 | 31 May 2024 | British | 52 years |
| Stephen James Rosier | Director | 16 Jul 1991 | 27 Dec 1991 | British | 70 years |
| Susan Caroline Parry | Director | 1 Jul 1993 | 1 Jul 1995 | British | 70 years |
| Susan Jill Parkinson | Director | 16 Jul 1991 | 2 May 1996 | British | 65 years |