| Adam Charles Winslow | Director | 4 Mar 2015 | 29 Jul 2019 | British | 47 years |
| Adam Charles Winslow | Director | 4 Mar 2015 | 31 Dec 2020 | British | 47 years |
| Andrew Stuart Watson | Director | 11 Feb 2013 | 31 Dec 2014 | British | 64 years |
| Barry Duncan Smith | Director | 11 Sept 2007 | 31 Mar 2013 | British | 72 years |
| Bianca Elisabeth Maria Tetteroo | Director | 27 Nov 2007 | 12 Feb 2009 | Dutch | 57 years |
| Darren Stephen Spriggs | Director | 28 Mar 2011 | 30 Sept 2015 | British | 58 years |
| Donald John Maclean | Director | 7 Jun 2017 | 18 Oct 2024 | British | 46 years |
| Ernesto Federico Spagnoli Jaramillo | Director | 4 Mar 2015 | 31 Mar 2016 | Argentine | 53 years |
| Fernley Keith Dyson | Director | 11 May 2012 | 31 Dec 2014 | British | 61 years |
| Gavin Philip Lock | Director | 15 Dec 2015 | 1 Apr 2017 | British | 60 years |
| Jane Elizabeth Dale | Director | 28 Mar 2012 | 30 Sept 2015 | British | 66 years |
| Julian Christopher Hance | Director | 5 May 2011 | 31 Mar 2013 | British | 71 years |
| Julian Robert Mark Harvey | Director | 8 Oct 2007 | 31 Dec 2012 | British | 69 years |
| Karen Jane Penney | Director | 13 Jul 2023 | 30 Sept 2024 | British | 65 years |
| Kate Hillery | Secretary | 31 Dec 2014 | 26 Feb 2021 | - | - |
| Laura Christine Mccracken | Director | 26 Feb 2021 | 31 Mar 2023 | British,american | 57 years |
| Laura Santori | Director | 5 Nov 2018 | 28 Feb 2022 | Italian | 58 years |
| Mark Andrew Robinson | Secretary | 26 Feb 2021 | 10 Aug 2023 | - | - |
| Mark Winlow | Director | 3 Oct 2012 | 6 Dec 2018 | British | 64 years |
| Martin David Werth | Director | 11 Sept 2007 | 31 Dec 2011 | British | 66 years |
| Martinclair Pike | Director | 20 Jan 2021 | 24 Nov 2024 | British | 65 years |
| Matthew David Thomas | Director | 8 Oct 2007 | 31 Dec 2014 | Welsh | 58 years |
| Michael Norris Urmston | Director | 23 Jan 2009 | 27 Feb 2021 | British | 77 years |
| Paul Frederick Thomas Langton | Director | 27 Nov 2007 | 30 Apr 2011 | British | 61 years |
| Peter David Thomas | Director | 1 Jul 2013 | 30 Apr 2016 | British | 72 years |
| Philip Craig Willcock | Director | 12 Jun 2019 | 18 Oct 2024 | British | 55 years |
| Robert Peter Sewell | Director | 30 Mar 2023 | 20 Jul 2023 | Irish | 62 years |
| Rosemary Anne Smith | Secretary | 11 Sept 2007 | 31 Dec 2014 | British | - |
| Shanti Duggal | Director | 11 Sept 2007 | 28 Mar 2011 | British | 81 years |
| Stefan Georges Leon Braekeveldt | Director | 27 Nov 2007 | 30 Mar 2010 | Belgian | 66 years |
| Tim Heslin | Director | 27 Mar 2024 | 8 Apr 2024 | American | 52 years |
| Timothy Michael Heslin | Director | 9 Sept 2016 | 26 Nov 2019 | American | 52 years |
| Todd Paul Solash | Director | 6 Aug 2021 | 17 Aug 2023 | American | 51 years |
