| Annette Elizabeth Court | Director | 1 Sept 2003 | 8 Nov 2006 | British | 63 years |
| Balz Hoesly | Director | 2 Feb 1993 | 22 Sept 1994 | Swiss | 67 years |
| Christopher Paul Sullivan | Director | 22 Jan 2007 | 30 Nov 2007 | British | 68 years |
| Colin Angus Baillie | Director | 16 Jul 2009 | 9 Oct 2015 | British | 66 years |
| David Hills | Director | 17 Sept 2012 | 9 Oct 2015 | British | 64 years |
| David Mcgraw | Director | 1 Jul 2011 | 4 Aug 2016 | British | 64 years |
| Finlay Ferguson Williamson | Director | 1 Dec 2007 | 30 Jun 2009 | British | 66 years |
| Gary Francis Strain | Director | 1 Dec 2007 | 1 Jul 2011 | British | 65 years |
| Ian Hugh Chippendale | Director | 1 Sept 2003 | 8 Nov 2006 | British | 76 years |
| James Samuel John Gilbert | Director | 11 Jun 2018 | 28 May 2020 | British | 48 years |
| John Brendan O'roarke | Director | 18 May 1995 | 30 Jun 2005 | British | 67 years |
| John Colin Smith | Director | 11 Jun 2018 | 30 Apr 2020 | British | 51 years |
| John Whittome Timmis | Director | 3 Oct 1991 | 1 Sept 2003 | British | 78 years |
| John Whittome Timmis | Secretary | 3 Oct 1991 | 5 Mar 2002 | British | - |
| Kevin Matthew Hanley | Director | 25 Sept 2015 | 28 Jan 2019 | British | 57 years |
| Kristofer Jon Davies | Director | 28 May 2020 | 6 Aug 2021 | British | 44 years |
| Mark Alexander Hesketh | Director | 16 May 2006 | 30 Nov 2007 | British | 64 years |
| Martin Paul Long | Director | 3 Oct 1991 | 1 Nov 2004 | British | 75 years |
| Michael Nicholas Quinton | Director | 16 May 2006 | 20 Sept 2007 | British | 64 years |
| Paul Bernard Cassidy | Secretary | 5 Mar 2002 | 31 Dec 2003 | British | - |
| Penelope Ann Hutchings | Secretary | 14 Apr 2005 | 30 Jun 2012 | British | - |
| Peter Jeremy Atkinson | Secretary | 31 Dec 2003 | 21 Jan 2006 | British | - |
| Peter Vogel | Director | 3 Oct 1991 | 2 Feb 1993 | Swiss | 81 years |
| Rbs Secretarial Services Limited | Corporate Secretary | 30 Jun 2012 | 8 Feb 2019 | United Kingdom | - |
| Richard David Houghton | Director | 31 Dec 2004 | 22 Jan 2007 | British | 60 years |
| Scott Gibson | Director | 28 May 2020 | 22 Aug 2023 | British | 45 years |
| Simon Anthony Mcnamara | Director | 25 Sept 2015 | 8 Feb 2019 | British | 66 years |
| Thomas Edouard Popp | Director | 22 Sept 1994 | 27 Nov 2000 | Swiss | 76 years |
| Thomas Popp | Director | 3 Oct 1991 | 2 Feb 1993 | Swiss | 76 years |