| Abigail Victoria Harding | Director | 16 Aug 2019 | 24 Jan 2020 | British | 36 years |
| Agnes Christina Lynch | Director | 12 Jul 2002 | 6 Sept 2005 | British | 59 years |
| Alan George Scott | Director | 6 Sept 2005 | 31 Aug 2010 | British | 76 years |
| Alberto Buffa | Director | 9 Oct 2015 | 9 Dec 2016 | Italian | 41 years |
| Antony John Gara | Director | 30 Nov 2022 | 23 Jun 2025 | British | 52 years |
| Christina Bridget Ryan | Director | 3 Mar 2010 | 31 Mar 2025 | Irish | 66 years |
| Christina Bridget Ryan | Secretary | 23 Jan 1995 | 18 Dec 1995 | Irish | - |
| Colin John Holmes | Director | 4 Feb 1993 | 1 Sept 1995 | British | 70 years |
| Craig Ian Machell | Director | 9 Oct 2015 | 26 Jan 2017 | British | 40 years |
| Esther Patricia Curran | Secretary | 23 Jan 1995 | 18 Dec 1995 | British | - |
| Heather Gwendolyn Brierley | Director | 8 May 2002 | 16 Aug 2019 | British | 55 years |
| Helen Louise Ashton | Director | 8 May 2002 | 3 Mar 2010 | British | 64 years |
| Hope Hannah Mcfarlane-edmond | Director | 19 Oct 2023 | 23 Jun 2025 | British | 33 years |
| John Christopher Challis | Director | 8 Oct 1992 | 12 Jan 1998 | British | 73 years |
| John Christopher Challis | Director | 6 Sept 2005 | 25 Nov 2010 | British | 73 years |
| Jon Robert Burch | Director | 30 Nov 2022 | 19 Oct 2023 | British | 32 years |
| Katherine Ann Walker | Director | 1 Dec 1995 | 12 Jul 2002 | British | 75 years |
| Katherine Mary Duffy | Director | 8 Oct 1992 | 31 Jul 2000 | British | 81 years |
| Kathryn Alice Zielinski | Director | 16 Aug 2019 | 30 Nov 2022 | British | 36 years |
| Louise Alison Clare Blackwell | Director | 16 May 2016 | 11 Nov 2019 | British | 44 years |
| Michael Joseph Mohun | Director | 1 Jun 2017 | 4 Oct 2019 | Australian | 36 years |
| Paula Annette Walsh | Director | 30 Nov 2000 | 30 Apr 2004 | British | 61 years |
| Paula Annette Walsh | Secretary | 12 Jul 1993 | 18 Dec 1995 | British | - |
| Philip Norman Allenby | Director | 25 Nov 2010 | 14 Oct 2015 | British | 66 years |
| Richard David Price | Secretary | 8 Oct 1992 | 18 Jun 1993 | British | - |
| Robert John Harwood | Director | 12 Jan 1998 | 8 May 2002 | British | 66 years |
| Stephen John Prior | Director | 8 Oct 1992 | 6 Sept 2005 | British | 73 years |
| Vivienne Ann Haynes | Director | 31 Aug 2010 | 18 Dec 2015 | British | 68 years |
| William Paton Stringer | Director | 6 Sept 2005 | 19 Mar 2007 | British | 69 years |