| Adrian John Wallace | Director | 6 Jan 2020 | 15 May 2023 | British | 54 years |
| Amit Rishi Jaysukh Thakrar | Director | 18 Feb 2022 | 19 Jul 2023 | British | 38 years |
| Andres Sacristan Martin | Director | 11 Feb 2014 | 1 Jan 2017 | Spanish | 54 years |
| Andrew David Clapp | Director | 9 Sept 2019 | 27 Aug 2021 | British | 50 years |
| Andrew Lee Milner | Director | 11 Feb 2014 | 27 Jul 2016 | British | 56 years |
| Asif Ghafoor | Director | 11 Feb 2014 | 13 Mar 2020 | British | 55 years |
| Barbara Sophie Lantz | Director | 27 Apr 2021 | 9 Feb 2024 | French | 39 years |
| Barry Edward White | Director | 13 Feb 2014 | 20 May 2015 | British | 60 years |
| Barry Edward White | Director | 20 May 2015 | 19 May 2016 | British | 60 years |
| Barry Edward White | Director | 20 May 2016 | 24 May 2017 | British | 60 years |
| Barry Edward White | Director | 24 May 2017 | 29 Jan 2018 | British | 60 years |
| Barry Paul Millsom | Director | 15 Jan 2018 | 24 Oct 2018 | British | 51 years |
| Christian Torrell | Director | 24 Jan 2020 | 17 Jul 2020 | Spanish | 51 years |
| Federico Gredilla Molinero | Director | 11 Feb 2014 | 18 Sept 2015 | Spanish | 55 years |
| Gabriel Gutiérrez Arnaiz | Director | 8 Feb 2019 | 31 Dec 2019 | Spanish | 54 years |
| Ivan Pio Maestre Santos-suarez | Director | 1 Jan 2018 | 1 Oct 2018 | Spanish | 49 years |
| James Stefan Haluch | Director | 27 Jul 2016 | 15 Jan 2018 | British | 56 years |
| John Gerard Connelly | Director | 22 Oct 2014 | 25 Nov 2016 | British | 65 years |
| John Gerard Connelly | Director | 15 Jan 2018 | 13 Mar 2020 | British | 65 years |
| John Gerard Connelly | Director | 23 Apr 2020 | 31 Mar 2022 | British | 65 years |
| Jorge Arozamena Baro | Director | 15 Jun 2023 | 17 Oct 2025 | Spanish | 39 years |
| Jose Angel Tamariz-martel Goncer | Director | 1 Jan 2017 | 1 Jan 2018 | Spanish | 57 years |
| Joseph Mark Linney | Director | 27 Aug 2021 | 18 Feb 2022 | British | 67 years |
| Juan Navarrete Carmona | Director | 1 Oct 2018 | 8 Feb 2019 | Spanish | 42 years |
| Juan Ramon Perez Perez | Director | 20 May 2015 | 20 May 2015 | Spanish | 59 years |
| Juan Ramon Perez Perez | Director | 18 Sept 2015 | 6 Dec 2024 | Spanish | 59 years |
| Katherine Emma Forbes | Director | 10 Nov 2014 | 17 Aug 2016 | British | 37 years |
| Kenneth John Simpson | Director | 24 May 2017 | 6 Dec 2017 | British | 60 years |
| Kevin Brown | Director | 14 Sept 2015 | 24 May 2017 | British | 49 years |
| Leo William Mckenna | Director | 24 Oct 2018 | 26 May 2023 | Northern Irish | 59 years |
| Michael William Weston | Director | 6 Dec 2017 | 4 Jan 2019 | British | 61 years |
| Nafees Arif | Secretary | 11 Feb 2014 | 15 Mar 2016 | - | - |
| Nial Watson Gemmell | Director | 29 Jan 2018 | 1 Mar 2022 | British | 57 years |
| Nicola Covington | Director | 11 Feb 2014 | 10 Nov 2014 | British | 48 years |
| Paul Ellis Gill | Director | 6 Dec 2017 | 27 Aug 2019 | British | 50 years |
| Peter Charles Maxwell Reekie | Director | 20 May 2015 | 20 May 2015 | British | 54 years |
| Peter Charles Maxwell Reekie | Director | 19 May 2016 | 20 May 2016 | British | 54 years |
| Peter Charles Maxwell Reekie | Director | 24 May 2017 | 24 May 2017 | British | 54 years |
| Philip Peter Ashbrook | Director | 4 Jan 2019 | 26 Jan 2023 | British | 65 years |
| Richard Mark Ashcroft | Director | 13 Dec 2013 | 27 Apr 2021 | British | 58 years |
| Rosanagh Frances Eden | Director | 17 Aug 2016 | 6 Dec 2017 | British | 36 years |
| Thilo Rose | Director | 16 Dec 2013 | 13 Jan 2020 | German | 53 years |
| William James Haughey | Director | 11 Feb 2014 | 14 Sept 2015 | British | 51 years |
