| Adam Christopher Drummond | Director | 6 Jun 2017 | 31 Aug 2018 | British | 39 years |
| Alan Alexander Wallace Waddell | Director | 29 Aug 1990 | 9 May 2003 | British | 93 years |
| Andrew Alan Wallace Waddell | Director | 14 May 2001 | 31 Aug 2018 | British | 57 years |
| Andrew Timothy Morris | Director | 31 Aug 2018 | 30 Jun 2023 | British | 62 years |
| Craig Charles Baxter | Director | 29 May 2014 | 31 Aug 2018 | British | 52 years |
| Graham Herbert Wallace Waddell | Director | 1 Sept 1993 | 31 Aug 2018 | British | 62 years |
| James Andrew Butcher | Director | 5 Jun 2019 | 15 May 2020 | British | 67 years |
| James Mailor Wilson | Director | 15 Sept 2017 | 20 Mar 2018 | British | 57 years |
| James Robertson Gibb | Director | 29 Aug 1990 | 8 May 1998 | British | 92 years |
| James Russell Mcculloch | Director | 29 Aug 1990 | 12 May 2016 | British | 72 years |
| Jennifer Elizabeth Mathias | Director | 30 Jun 2023 | 31 Dec 2023 | British | 52 years |
| Kirstin Lewis Donaldson | Director | 26 May 2015 | 17 Apr 2020 | British | 49 years |
| Michael James Wilson | Director | 10 May 1999 | 11 Jun 2025 | British | 59 years |
| Peter Charles Marshall Roger | Director | 29 Aug 1990 | 15 May 2000 | British | 84 years |
| Peter Charles Marshall Roger | Secretary | 29 Aug 1990 | 1 Oct 1999 | British | - |
| Philip Luard Howell | Director | 31 Aug 2018 | 9 May 2019 | British | 71 years |
| Robert Steele Waddell | Director | 29 Aug 1990 | 12 May 1995 | British | 95 years |
| Russell Lang Crichton | Director | 10 May 1999 | 20 Mar 2020 | British | 66 years |
| Steven William James Mathieson | Director | 15 May 2000 | 1 Jul 2019 | British | 62 years |
| Steven William James Mathieson | Secretary | 1 Oct 1999 | 28 Nov 2018 | British | - |
| Thomas Muirhead Birnie Brown | Director | 17 May 2010 | 31 Aug 2018 | British | 49 years |
| Wilbur Graeme Dickie | Director | 15 May 1995 | 31 Aug 2018 | British | 64 years |
