| 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, United Kingdom |
| 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 | | 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 |
| BENSTEAD, Colin RESIGNED | Director | 21 Aug 1997 | 09 Nov 2001 | | March 1942 | 24 Crosthwaite Way, Burnham, Slough, Berkshire, SL1 6EX |
| BRYDON, Antony Gavin Dominic, Dr RESIGNED | Director | 31 Dec 2007 | 02 Mar 2010 | Scotland | October 1967 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ |
| CAREY, Roger William RESIGNED | Director | | 02 Nov 1994 | United Kingdom | July 1944 | Instow, Burtons Way, Chalfont St Giles, Buckinghamshire, HP8 4BP |
| 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 |
| 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 |
| ELLIS, Andrew Roderick, Dr RESIGNED | Director | 22 Nov 2001 | 31 Dec 2007 | | May 1961 | 5 The Cedars, Brockham Lane, Brockham, Surrey, RH3 7EJ |
| 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 | 13 Jul 2016 | 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 | | 31 Dec 2004 | | March 1948 | Laurel House, 2 Woodcote Place, Ascot, Berkshire, SL5 7JT |
| MOBBS, Gerald Nigel, Sir RESIGNED | Director | | 02 Nov 1994 | | September 1937 | Widmer Lodge, Parslows Hillock, Princes Risborough, Buckinghamshire, HP27 0RJ |
| 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 | 19 Dec 1994 | 31 Dec 2007 | England | August 1950 | 48 Fir Tree Avenue, Wallingford, Oxfordshire, OX10 0PD |
| RENNET, Brandon James RESIGNED | Director | 02 Mar 2010 | 13 Mar 2013 | United Kingdom | November 1972 | Inveralmond House 200, Dunkeld Road, Perth, Perthshire, PH1 3AQ |
| SIMONS, David Edmund Frederick RESIGNED | Director | | 02 Oct 2002 | England | October 1940 | Blue Cedars, Wayside Gardens, Gerrards Cross, Buckinghamshire, SL9 7NG |
| SMITH, Paul Richard RESIGNED | Director | 31 Dec 2007 | 13 Jul 2016 | United Kingdom | January 1963 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH |
| THOMSON, Hugh Linklater RESIGNED | Director | | 02 Nov 1994 | | July 1945 | 38 Charlbury Road, Oxford, Oxfordshire, OX2 6UX |
| WILSON, Derek Robert RESIGNED | Director | | 04 Nov 2002 | | October 1944 | The Spinney Misbourne Avenue, Chalfont St Peter, Gerrards Cross, Buckinghamshire, SL9 0PF |