| Abhinav Kumar Shah | Director | 16 Aug 2011 | 25 Jan 2017 | British | 51 years |
| Adam Paul Loveridge | Director | 13 Jul 2009 | 7 May 2010 | Australian | 45 years |
| Ashley Hudd | Director | 11 May 2010 | 11 Oct 2011 | British | 46 years |
| Barrie Hill | Director | 18 Sept 2014 | 8 Jan 2016 | British | 44 years |
| Christopher Patrick Le Neve Foster | Director | 18 Jan 2016 | 30 Apr 2021 | British | 44 years |
| Colin Gyte | Director | 18 Sept 2014 | 8 Jan 2016 | British | 45 years |
| Darren Wang Yip Lui | Director | 10 Jul 2009 | 25 Jun 2010 | British | 44 years |
| David John Blagbrough | Director | 7 Jul 2021 | 27 Oct 2021 | British | 37 years |
| Florian Huber | Director | 15 Dec 2011 | 5 Sept 2014 | Austrian | 47 years |
| Gerald Mark Frederick Brawn | Director | 10 Jul 2009 | 16 Aug 2011 | British | 63 years |
| Graeme James Clark | Director | 13 Oct 2011 | 5 Sept 2014 | British | 53 years |
| Jonathan Michael Walthoe | Director | 30 Nov 2017 | 27 Oct 2021 | British | 50 years |
| Kate Liana Pearson | Director | 29 Apr 2021 | 27 Oct 2021 | British | 35 years |
| Kostyantyn Lykhman | Director | 16 Aug 2011 | 15 Dec 2011 | British | 45 years |
| Maria Alvarez Garcia | Director | 6 Jul 2010 | 12 Apr 2011 | Spanish | 45 years |
| Mark E Wuest | Director | 27 Oct 2021 | 30 May 2023 | American | 68 years |
| Nicholas Richard Brand | Director | 10 Jul 2009 | 5 Sept 2014 | British | 50 years |
| Patrick Brittain Voisey | Director | 18 Jan 2016 | 7 Jul 2021 | British | 46 years |
| Sarah Elizabeth Hollinsworth | Director | 18 Sept 2014 | 27 Jul 2015 | British | 44 years |
| Stephen James Ullman | Director | 10 Jul 2009 | 16 Aug 2011 | British | 58 years |
| Vishal Shah | Director | 29 Jul 2015 | 27 Oct 2021 | British | 41 years |