| Andrew James Timlin | Director | 29 Jun 2020 | 28 May 2021 | British | 49 years |
| Charles Simon Russell Pope | Director | 26 Jan 2012 | 13 Feb 2014 | British | 61 years |
| Christopher Francis Henry Baker | Director | 14 Nov 2016 | 28 May 2021 | British | 71 years |
| Craig Hilton Rodgerson | Director | 13 Feb 2014 | 14 Nov 2016 | British | 62 years |
| Gary Shilston | Director | 4 Sept 2023 | 31 Jul 2025 | British | 59 years |
| James Cowan | Director | 26 Jan 2017 | 2 May 2023 | British | 52 years |
| Jamie Leigh Radford | Director | 3 Sept 2015 | 1 Sept 2016 | British | 51 years |
| Matthew Dominic Fairweather | Director | 2 May 2023 | 27 Jul 2023 | British | 47 years |
| Michael Patrick Collier | Director | 13 Feb 2014 | 3 Sept 2015 | British | 51 years |
| Paolo Ferdinando Bongiovanni | Director | 5 Dec 2011 | 13 Feb 2014 | Italian | 49 years |
| Peter Matthew Collins | Director | 5 Dec 2011 | 13 Feb 2014 | British | 51 years |
| Stefan John Maynard | Director | 13 Feb 2014 | 29 Jun 2020 | British | 54 years |
| William Stephen Mcbrinn | Director | 1 Sept 2016 | 28 Feb 2017 | British | 58 years |