| Alan Russell Todd | Director | 11 May 1991 | 31 Dec 1994 | British | 88 years |
| Allan Robert Carey | Secretary | 11 May 1991 | 30 Sept 2020 | British | - |
| Andrew William Yallop | Director | 20 Dec 2005 | 31 Dec 2013 | British | 79 years |
| Anthony John Timms | Director | 31 Aug 2001 | 20 Dec 2005 | British | 86 years |
| John Brotherton Ratcliffe | Director | 11 May 1991 | 31 Aug 2001 | British | 107 years |
| John Henry Francis Simson | Director | 11 May 1991 | 4 Jun 2001 | British | 95 years |
| Nigel Kenrick Grosvenor Prescot | Director | 19 May 2017 | 10 Oct 2022 | British | 64 years |
| Nigel Loudon Constantine | Director | 4 Jun 2001 | 19 May 2017 | British | 72 years |
| Russell Kane Denness | Director | 1 Jan 2014 | 31 May 2023 | British | 67 years |