| Alexander Scott Bell | Director | 11 Apr 1989 | 22 Jan 2002 | British | 85 years |
| Archibald James Angus Macuish Gray | Secretary | 11 Apr 1989 | 14 Nov 1993 | British | - |
| Brid Mary Meaney | Director | 30 Apr 2021 | 23 Aug 2024 | Irish | 52 years |
| David Clayton | Director | 1 Sept 2010 | 8 Aug 2014 | British | 64 years |
| David Drysdale Fotheringham | Secretary | 15 Nov 1993 | 1 Mar 1996 | British | - |
| Iain Cobden Lumsden | Director | 26 May 1998 | 22 Jan 2002 | British | 80 years |
| James Stretton | Director | 11 Apr 1989 | 15 Dec 2001 | British | 83 years |
| John Francis Henry Trott | Director | 22 Mar 1994 | 28 Apr 1998 | British | 88 years |
| Kenneth Arthur Gilmour | Secretary | 30 Sept 2011 | 31 Aug 2018 | - | - |
| Lawrence Airey | Director | 11 Apr 1989 | 22 Mar 1994 | British | 100 years |
| Malcolm James Wood | Secretary | 1 Jan 2007 | 30 Sept 2011 | British | - |
| Norman Lessels | Director | 11 Apr 1989 | 28 Apr 1998 | British | 88 years |
| Peter Walter Somerville | Secretary | 1 Mar 1996 | 1 Jan 2007 | British | - |
| Standard Life (directors) Limited | Corporate Director | 22 Jan 2002 | 1 Sept 2010 | United Kingdom | - |
| Stephen Keith Percival | Director | 8 Aug 2014 | 30 Apr 2021 | British | 51 years |
