| SWAN, Colin Charles ACTIVE | Secretary | 14 Oct 2025 | | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| BEATTIE, Martin ACTIVE | Director | 27 Nov 2025 | | Scotland | March 1981 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH, Scotland |
| KINNERSLEY, Graeme ACTIVE | Director | 19 May 2026 | | United Kingdom | July 1985 | 1100 Century Way, Thorpe Park Business Park, Colton, Leeds, LS15 8TU, England |
| MCCUTCHEON, Finlay Alexander ACTIVE | Director | 16 Jun 2025 | | Scotland | November 1977 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| ZUILL, Aaron Jeremy ACTIVE | Director | 07 Oct 2024 | | England | November 1974 | Slough Heat & Power Limited, 342 Edinburgh Avenue, Slough, SL1 4TU |
| ATKINSON, Graham RESIGNED | Secretary | 04 Apr 2023 | 14 Oct 2025 | | | No.1 Forbury Place, 43 Forbury Road, Reading, RG1 3JH, United Kingdom |
| DONNELLY, Lawrence John Vincent RESIGNED | Secretary | 31 Dec 2007 | 01 Dec 2014 | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ |
| FAIRBAIRN, Sally RESIGNED | Secretary | 01 Dec 2014 | 20 Apr 2017 | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| KHALID, Mohammed Shehzad RESIGNED | Secretary | 19 Aug 2019 | 04 Apr 2023 | | | Unit 4 Queen Anne Dr, Newbridge, EH28 8PL, United Kingdom |
| PROBERT, John Robert RESIGNED | Secretary | 15 Dec 1994 | 31 Dec 2007 | | | 2 Compton Way Taylors Farm, Sherfield On Loddon, Hook, RG27 0SQ |
| SHARMA, Brian Dominic RESIGNED | Secretary | 20 Apr 2017 | 19 Aug 2019 | | | No.1 Forbury Place, 43 Forbury Road, Reading, RG1 3JH, United Kingdom |
| TKB REGISTRARS LIMITED RESIGNED | Nominee Secretary | 24 Feb 1994 | 19 Dec 1994 | | | 50 Stratton Street, London, W1X 6NX |
| BEAL, David RESIGNED | Director | 15 Dec 1994 | 11 Jan 2000 | | March 1944 | 2 Hopton Crofts, Milverton, Leamington Spa, Warwickshire, CV32 6NT |
| BRYDON, Antony Gavin Dominic, Dr RESIGNED | Director | 31 Dec 2007 | 02 Mar 2010 | Scotland | October 1967 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ |
| CHANDLER, Stuart Piers RESIGNED | Director | 30 Mar 1995 | 01 Oct 1996 | | December 1955 | 24 Holbein Close, Belgrave Park, Chester, CH4 7EU |
| CHARLTON, Anthony RESIGNED | Director | 30 Mar 1995 | 28 Jan 1997 | | February 1947 | 4 Sevenacres, Thame, Oxfordshire, OX9 3JQ |
| CLEMENTS, Phil RESIGNED | Director | 04 Nov 2020 | 30 May 2023 | United Kingdom | July 1980 | No.1 Forbury Place, 43 Forbury Road, Reading, RG1 3JH, United Kingdom |
| CONNAIRE, Gabriel RESIGNED | Director | 17 Oct 1995 | 28 Jan 1997 | | September 1958 | 44 Bellevue Road, Ealing, London, W13 8DE |
| COWLING, Simon John RESIGNED | Director | 30 May 2023 | 07 Oct 2024 | England | April 1981 | No.1 Forbury Place, 43 Forbury Road, Reading, RG1 3JH, United Kingdom |
| DUCKWORTH, John RESIGNED | Director | 29 Jun 1994 | 19 Dec 1994 | | October 1931 | The Old Butchers Arms, 5 Bells Lane, Nether Wallop, Hampshire, SO20 8EN |
| ELLIS, Andrew Roderick, Dr RESIGNED | Director | 01 Oct 1996 | 31 Dec 2007 | | May 1961 | 5 The Cedars, Brockham Lane, Brockham, Surrey, RH3 7EJ |
| EMMERSON, Christopher Matthew RESIGNED | Director | 30 Sep 1997 | 11 Jan 2000 | | February 1959 | Rock Mill The Hollow, Washington, Pulborough, West Sussex, RH20 3DA |
| HASTINGS, Derek Nicholas RESIGNED | Director | 13 Jul 2016 | 01 Jan 2018 | United Kingdom | February 1971 | Slough Heat & Power Limited, 342 Edinburgh Avenue, Slough, SL1 4TU, United Kingdom |
| HAYWARD, Mark Richard RESIGNED | Director | 29 Mar 2013 | 19 May 2026 | United Kingdom | November 1963 | Fiddler's Ferry Power Station, Widnes Road, Cuerdley, Warrington, WA5 2UT, United Kingdom |
| JACKSON, Philip Norman, Dr RESIGNED | Director | 15 Dec 1994 | 31 Dec 2004 | | March 1948 | Laurel House, 2 Woodcote Place, Ascot, Berkshire, SL5 7JT |
| MULLEN, John RESIGNED | Director | 01 Jan 2018 | 04 Nov 2020 | United Kingdom | November 1972 | No.1 Forbury Place, 43 Forbury Road, Reading, RG1 3JH, United Kingdom |
| PEBWORTH, Jonathan RESIGNED | Director | 15 Dec 1994 | 31 Dec 2007 | England | August 1950 | 48 Fir Tree Avenue, Wallingford, Oxfordshire, OX10 0PD |
| QUINN, David Laurence, Mr. RESIGNED | Director | 30 Sep 1997 | 28 Sep 1999 | England | September 1955 | 6 Whitecross Road, Haddenham, Buckinghamshire, HP17 8BA |
| RENNET, Brandon James RESIGNED | Director | 02 Mar 2010 | 29 Mar 2013 | United Kingdom | November 1972 | Inveralmond House 200, Dunkeld Road, Perth, Perthshire, PH1 3AQ |
| ROPER, Mervyn Edward Patrick RESIGNED | Nominee Director | 24 Feb 1994 | 29 Jun 1994 | | October 1954 | 19 Criffel Avenue, London, SW2 4AY |
| SMITH, Paul Richard RESIGNED | Director | 31 Dec 2007 | 31 May 2016 | United Kingdom | January 1963 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH |
| STEWART, Martin Richard RESIGNED | Director | 29 Sep 1998 | 11 Jan 2000 | United Kingdom | July 1960 | 49 Meols Drive, Hoylake, Wirral, Merseyside, CH47 4AF |
| WAKELIN, Ian Raymond RESIGNED | Director | 15 Dec 1994 | 03 Oct 1997 | England | March 1963 | Fox Covert Farm, Marsh Gibbon, Bicester, Oxfordshire, OX6 0AQ |
| WILES, David Anthony RESIGNED | Director | 14 Nov 1995 | 29 Sep 1998 | England | July 1949 | 16 Chive Road, Lower Earley, Reading, Berkshire, RG6 5XP |