| Daniel Marinus Maria Vermeer | Director | 8 May 2018 | 14 Nov 2022 | Dutch | 45 years |
| David Adams | Secretary | 1 Feb 2016 | 5 Nov 2018 | - | - |
| Gilles Leonard | Director | 2 May 2012 | 22 Nov 2012 | British | 45 years |
| Glenn Sinclair Pearce | Director | 7 Dec 2023 | 1 Oct 2024 | British | 54 years |
| Ian Hilary Smith | Director | 2 May 2012 | 15 Dec 2016 | British | 67 years |
| Kirti Ratilal Shah | Secretary | 5 Nov 2018 | 15 Jul 2022 | - | - |
| Mark Gwynfor George Davies | Director | 2 May 2012 | 15 Jul 2015 | British | 57 years |
| Mark Gwynfor George Davies | Director | 28 Feb 2017 | 4 Apr 2017 | British | 57 years |
| Mark Jonathan Fowkes | Director | 17 Dec 2012 | 7 Dec 2023 | British | 56 years |
| Matthew Thomas Rickards | Director | 15 Dec 2016 | 4 Apr 2017 | British | 40 years |
| Nicholas Giles Burley Parker | Director | 2 May 2012 | 17 Dec 2012 | British | 57 years |
| Nicolas Alexandre Pierre Guerin | Director | 30 Oct 2012 | 17 Dec 2015 | French | 60 years |
| Nicolas Vincent Christian Swiderski | Director | 2 Dec 2012 | 17 Dec 2015 | French | 45 years |
| Peter John Sheldrake | Director | 3 Mar 2014 | 8 May 2018 | British | 67 years |
| Robert Alistair Martin Gillespie | Director | 21 Apr 2017 | 1 Feb 2022 | British | 36 years |
| Samantha Tracy Veal | Director | 15 Jul 2015 | 28 Feb 2017 | British | 59 years |
| Sion Laurence Jones | Director | 2 May 2012 | 3 Mar 2014 | English | 52 years |
| Stephane Slama Royer | Director | 19 Apr 2012 | 30 Oct 2012 | French | 61 years |
