| Alistair Mark Todd | Director | 3 Mar 2015 | 24 Oct 2017 | British | 51 years |
| Anne Leigh Tavaziva | Director | 22 Nov 2019 | 10 Jun 2020 | British | 53 years |
| Charles Lee Mcleod | Director | 13 May 2019 | 16 Dec 2021 | British | 54 years |
| Christopher John Stern | Director | 2 Jun 2008 | 30 Sept 2018 | English | 69 years |
| David Alan Johnson | Director | 31 Jan 2017 | 30 Sept 2019 | British | 61 years |
| David John Hindley | Director | 1 Jan 2018 | 30 Sept 2021 | British | 66 years |
| David Thomas Mcaree Young | Director | 26 Jun 2009 | 31 Dec 2018 | British | 65 years |
| Edward Michael Dutton | Director | 12 May 2010 | 31 Dec 2018 | British | 57 years |
| Elizabeth Margaret Catchpole | Director | 2 Jan 2019 | 31 May 2021 | British | 61 years |
| Jana Siber | Director | 21 Jul 2022 | 28 Feb 2025 | British | 54 years |
| John Castagno | Director | 8 Dec 2009 | 30 Jun 2019 | Italian | 68 years |
| Kevin Michael D'arcy | Director | 19 Sept 2008 | 31 Mar 2017 | British | 63 years |
| Kevin Morris Sinclair | Director | 15 Jul 2009 | 31 Dec 2015 | British | 65 years |
| Mark Edward Borsey | Director | 19 Sept 2008 | 15 Jun 2010 | British | 60 years |
| Matthew James Bateman | Director | 3 Apr 2019 | 31 Jan 2022 | British | 58 years |
| Michael David Kirwan | Director | 13 Sept 2019 | 31 Aug 2020 | Irish | 55 years |
| Michael Robin Uzielli | Director | 24 Jan 2011 | 16 Jul 2012 | British | 56 years |
| Nicholas Lawrence Luff | Director | 1 Aug 2009 | 31 Aug 2014 | British | 59 years |
| Pamela Mary Coles | Director | 19 Sept 2008 | 16 Aug 2011 | British | 65 years |
| Paul Ian Hedley | Director | 2 Jun 2008 | 15 Jun 2009 | British | 57 years |
| Sarwjit Sambhi | Director | 2 Jan 2019 | 13 Sept 2019 | British | 57 years |
| Stephen John O'dwyer | Director | 10 Jul 2017 | 13 May 2019 | British | 57 years |
| Steven John Buck | Director | 16 Jul 2012 | 30 Sept 2014 | British | 57 years |
| Stuart David Phillips | Director | 16 Dec 2021 | 1 Dec 2022 | British | 49 years |
| Toby James Bailey Siddall | Director | 19 Sept 2008 | 23 Sept 2010 | British | 55 years |
| William George Green | Director | 19 Sept 2008 | 24 Dec 2008 | British | 67 years |