| Adam Paul Rutherford | Secretary | 1 Jul 1999 | 14 Jan 2000 | British | - |
| Alan Christopher Wren | Director | 9 May 1992 | 21 Nov 1992 | British | 77 years |
| Alan Ronald Cook | Director | 28 Mar 2000 | 28 Jun 2002 | British | 72 years |
| Charles Forte | Director | 1 Jul 2015 | 31 Dec 2016 | British | 68 years |
| Christopher Cochrane | Director | 13 Aug 2018 | 3 Aug 2021 | British | 47 years |
| Clare Jane Bousfield | Director | 19 Jul 2021 | 6 Dec 2021 | British | 57 years |
| Darren Wayne Sheppard | Director | 20 Jan 2017 | 26 Jun 2018 | British | 55 years |
| Desmond Sean Edward Burke | Director | 20 Jan 2017 | 29 Jun 2018 | British | 57 years |
| Gary Vincent | Director | 16 Nov 2006 | 29 Jun 2018 | British | 65 years |
| Hilary Anne Lowe | Secretary | 14 Jan 2000 | 3 Mar 2000 | British | - |
| Hugh Royston Jenkins | Director | 20 Nov 1992 | 31 Dec 1995 | British | 92 years |
| James White Jack | Director | 29 Jul 2003 | 30 Jul 2004 | British | 74 years |
| Jeremy Spencer Deeks | Director | 21 Oct 2015 | 31 Oct 2017 | British | 55 years |
| John Adrian Varcoe Grimshaw | Director | 20 Jan 2017 | 26 Jun 2018 | British | 63 years |
| John Kenneth Elbourne | Director | 27 Mar 1997 | 28 Mar 2000 | British | 81 years |
| John Stuart Frazer Anthony | Director | 23 Sept 2010 | 8 Sept 2015 | British | 60 years |
| Kathryn Mcleland | Director | 3 May 2022 | 2 Oct 2025 | British | 54 years |
| Keith Leonard Bedell Pearce | Director | 9 May 1992 | 6 Apr 1997 | British | 79 years |
| Keith R Moore | Director | 16 Nov 2006 | 30 Jun 2015 | Usa | 68 years |
| Kelvin Nunn | Director | 7 Nov 2005 | 1 Dec 2006 | British | 68 years |
| Kevin Alwyn Lewis | Director | 9 Jul 2006 | 12 Aug 2016 | British | 66 years |
| Maria Luisa Cassoni | Director | 3 Jan 1996 | 6 May 1998 | British | 74 years |
| Martin Lewis | Director | 21 Oct 2015 | 13 Jun 2016 | British | 69 years |
| Matthew David Croft | Director | 1 Jan 2016 | 29 Jun 2018 | British | 54 years |
| Michael John Moores | Director | 31 Oct 2001 | 9 Sept 2002 | British | 69 years |
| Miguel Eduardo Ortiz | Director | 1 Mar 2018 | 28 Feb 2019 | British | 61 years |
| Neil Anthony Berkett | Director | 1 Jul 2002 | 20 Jun 2003 | New Zealander | 70 years |
| Nicholas Frank Reed | Director | 16 Nov 2006 | 31 May 2010 | British | 60 years |
| Paul David Cooper | Director | 19 Jul 2021 | 6 May 2022 | British | 53 years |
| Paul Martin Bradford | Director | 30 Jul 1998 | 7 Jun 2001 | British | 65 years |
| Prudential Group Secretarial Services Limited | Corporate Secretary | 31 Oct 2001 | 4 Oct 2019 | United Kingdom | - |
| Rebecca Louise Wyatt | Director | 20 Jan 2017 | 26 Jun 2018 | British | 54 years |
| Richard Charles Everett | Director | 29 Jul 2003 | 7 Nov 2005 | British | 60 years |
| Robert Walker | Secretary | 9 May 1992 | 24 Sept 1997 | British | - |
| Roddy Thomson | Director | 7 Dec 2017 | 13 Aug 2018 | British | 45 years |
| Roddy Thomson | Director | 21 Mar 2019 | 27 Apr 2021 | British | 45 years |
| Shali Vasudeva | Director | 21 Oct 2015 | 26 Jan 2017 | British | 56 years |
| Simon Charles Yun-farmbrough | Director | 31 Dec 1997 | 1 Aug 2001 | British | 66 years |
| Steven John Mcgregor | Director | 20 Jan 2017 | 28 Feb 2018 | British/australian | 61 years |
| Susan Diane Morgan | Secretary | 31 Mar 2001 | 31 Oct 2001 | British | - |
| Susan Doreen Windridge | Secretary | 4 Mar 2000 | 31 Mar 2001 | British | - |
| Timothy James William Tookey | Director | 2 Sept 2002 | 29 Jul 2003 | British | 63 years |
| Tracey Lee Wellard | Secretary | 24 Sept 1997 | 1 Jul 1999 | British | - |