| SWAN, Colin ACTIVE | Secretary | 02 Feb 2024 | | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, United Kingdom |
| HUNTER, Andrew John ACTIVE | Director | 28 May 2010 | | United Kingdom | October 1958 | No. 2 G/F. 83 Stewart Terrace, 81-95 Peak Road, The Peak, Hong Kong, Hong Kong |
| MACKAY, Mandy ACTIVE | Director | 02 Feb 2024 | | United Kingdom | January 1976 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, United Kingdom |
| MACRAE, Duncan Nicholas ACTIVE | Director | 16 Jun 2011 | | United Kingdom | September 1970 | 12/F, Cheung Kong Center, 2 Queen's Road Central, Hong Kong, Hong Kong |
| MCGEE, Neil Douglas ACTIVE | Director | 28 May 2010 | | Hong Kong | October 1951 | Power Assets Limited, 10th Floor Hongkong Electric Centre, 44 Kennedy Road, Hong Kong, Hong Kong |
| RUDD, Adrian Marc James ACTIVE | Director | 21 Apr 2022 | | England | May 1971 | Fiddlers Ferry Power Station, Widnes Road, Warrington, WA5 2UT, United Kingdom |
| TSAI, Chao Chung Charles ACTIVE | Director | 10 Sep 2010 | | Hong Kong | July 1957 | 9/F Hongkong Electric Centre, 44 Kennedy Road, Hong Kong, China |
| EDWARDS, Mark RESIGNED | Secretary | 17 Jan 1999 | 25 Oct 2002 | | | Beechanger 18 Angel Meadows, Odiham, Hampshire, RG29 1AR |
| GARRIHY, Anne RESIGNED | Secretary | 22 Nov 1995 | 27 Jan 1997 | | | 38 Bunbury Way, Epsom, Surrey, KT17 4JP |
| INMAN, Carol Susan RESIGNED | Secretary | 25 Oct 2002 | 28 May 2010 | | | Severn Road, Hallen, Bristol, BS10 7SP |
| JONES, Maria Bernadette RESIGNED | Secretary | | 10 Oct 1995 | | | 1 Scriveners Close, Hillfield Road, Hemel Hempstead, Hertfordshire, HP2 4AA |
| MACAULAY, Barbara Scott RESIGNED | Secretary | 24 Feb 1995 | 17 Jan 1997 | | | 1 Mayfield Close, Harpenden, Hertfordshire, AL5 3LG |
| MACKAY, Lena Elizabeth RESIGNED | Secretary | 27 Jun 2022 | 17 Jan 2023 | | | Severn Road, Hallen, Bristol, BS10 7SP |
| MARKHAM, Una RESIGNED | Secretary | 10 Sep 1999 | 07 Sep 2001 | | | 18 Howard Road, Wokingham, Berkshire, RG40 2BX |
| MAYER, Stuart Michael RESIGNED | Secretary | 13 Jul 2015 | 27 Jun 2022 | | | Severn Road, Hallen, Bristol, BS10 7SP |
| MCVEAN, Laura RESIGNED | Secretary | 13 Sep 2010 | 25 Sep 2013 | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| PITTAM, Laura Jane RESIGNED | Secretary | 25 Sep 2013 | 13 Jul 2015 | | | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, Scotland |
| THOMAS, Luke RESIGNED | Secretary | 17 Jan 1997 | 17 Jan 1999 | | | 94 Watcombe Road, South Norwood, London, SE25 4UZ |
| ADAMSON, William Harvey RESIGNED | Director | 27 Sep 2002 | 12 Jul 2005 | | October 1948 | Ombu, Newlands Drive, Maidenhead, Berkshire, SL6 4LL |
| BRANDON, Stephen John RESIGNED | Director | 19 Jan 1996 | 12 Oct 1999 | | June 1947 | Grove House, 19 Grove Road, Beaconsfield, Buckinghamshire, HP9 1UR |
| BROOKS, David RESIGNED | Director | | 11 Mar 1994 | | July 1941 | Bramleys Orchard Chase, Hurst, Reading, RG10 0SW |
| BROWN, Malcolm Archibald Halliday RESIGNED | Director | 19 Jan 2000 | 19 Feb 2003 | United Kingdom | May 1953 | Hill Rising, Green Lane, Pangbourne, Berkshire, RG8 8LD |
| BROWN, Robert James RESIGNED | Director | 08 Jul 1991 | 01 Oct 1991 | England | March 1940 | 6 Waterfield, The Moat, Tunbridge Wells, Kent, TN2 5HX |
| BRYANT, John RESIGNED | Director | | 22 May 1995 | England | June 1946 | 105 Home Park Road, Wimbledon, London, SW19 7HT |
| BURT, Peter RESIGNED | Director | 31 Mar 2005 | 28 Mar 2008 | Kent | April 1966 | The Vallance, Callaways Lane, Newington, Sittingbourne, ME9 7LU |
| CHEN, Joanna Tsien Hua RESIGNED | Director | 28 May 2010 | 16 Jun 2011 | China | June 1962 | Flat B, 11/F Heng Fa Villa, Heng Fa Chuen, Hong Kong, Hong Kong |
| COOLIDGE, Henry Ten Eyck RESIGNED | Director | 01 Dec 2004 | 31 Mar 2009 | | October 1959 | 39 Belfast Road, Carrickfergus, County Antrim, BT38 8BY |
| DOWNES, John Anthony RESIGNED | Director | 20 Jun 2018 | 28 Aug 2019 | Scotland | May 1970 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH, Scotland |
| EARL, John Charles RESIGNED | Director | 21 Jul 1999 | 08 Jan 2002 | | January 1947 | Honeysuckle House, 20 Park View Drive South, Charvil Reading, Berkshire, RG10 9QX |
| FOX, Roger Anthony RESIGNED | Director | 19 Feb 2003 | 16 Feb 2004 | | May 1960 | Arbor Low, 39 Hainault Road, Chigwell, Essex, IG7 5DQ |
| GARDNER, Roy Alan, Sir RESIGNED | Director | 19 Jan 1996 | 11 Nov 1996 | | August 1945 | Old Hall Farm,Gill Hill, Markyate, St Albans, Hertfordshire, AL3 8AR |
| GRAY, Ann Miriam Georgina RESIGNED | Director | 14 Oct 2019 | 30 Jun 2025 | Scotland | April 1967 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, United Kingdom |
| HAMPTON, Philip Roy RESIGNED | Director | 11 Nov 1996 | 21 Jul 1999 | | October 1953 | Blakeney, Pennymead Rise, East Horsley, Leatherhead, Surrey, KT24 5AL |
| HILL, Melvyn RESIGNED | Director | 31 Mar 2009 | 01 Feb 2010 | | July 1946 | 12, Orchard Coombe, Whitchurch Hill, Reading, Berkshire, RG8 7QL |
| HONEYMAN, Alexander Hughes RESIGNED | Director | 13 Jul 2015 | 14 Oct 2019 | United Kingdom | February 1960 | 200, Dunkeld Road, Perth, PH1 3AQ, Scotland |
| HUGHES, Michael Alan RESIGNED | Director | | 22 Feb 1994 | | June 1945 | Hillcrest Lea Road, Hixon, Staffordshire, ST18 0NR |
| JUGGINS, Graham Gerald RESIGNED | Director | 12 Apr 1999 | 07 Jun 2005 | | September 1953 | 4 Langley Place, Perth, Perthshire, PH2 7XB |
| MARTIN, James Henry RESIGNED | Director | 01 Nov 1997 | 02 Oct 2001 | | September 1953 | Burn Brae House, East Dron , Bridge Of Earn, Perth, Perthshire, PH2 9HG |
| MORGAN, Iwan Rees RESIGNED | Director | 16 Jun 2016 | 14 Oct 2019 | Scotland | January 1961 | 200, Dunkeld Road, Perth, PH1 3AQ, Scotland |
| PHILLIPS-DAVIES, Paul Morton Alistair RESIGNED | Director | 07 Jun 2005 | 14 Nov 2013 | England | July 1967 | Grampian House, 200 Dunkeld Road, Perth, Perthshire, PH1 3GH |
| PIBWORTH, Martin James RESIGNED | Director | 14 Nov 2013 | 13 Jul 2015 | United Kingdom | December 1973 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH, Scotland |
| PRETSWELL, William Somerville RESIGNED | Director | | 12 Dec 1995 | | June 1940 | 44 Bradgate Road, Hinckley, Leicestershire, LE10 1LA |
| READ, Arnold Wadkin, Dr RESIGNED | Director | 19 Jan 1996 | 31 Oct 1997 | | October 1937 | 8 Gillespie Road, Edinburgh, Lothian, EH13 0LL |
| ROLLINS, Mark Andrew RESIGNED | Director | 08 Sep 2008 | 09 Oct 2009 | | May 1964 | 26, Chemin Des Racettes, 1297 Founex, Switzerland |
| ROSE, Stephen Paul RESIGNED | Director | 16 Mar 2017 | 18 Jun 2018 | England | October 1970 | Orbis Energy Building, Wilde Street, Lowestoft, Suffolk, NR32 1XH, United Kingdom |
| SARJEANT, Malcolm RESIGNED | Director | 08 Jan 2002 | 01 Dec 2004 | England | January 1947 | Leander House 4 Leander Place, Calcot, Reading, Berkshire, RG31 7DS |
| SHAW, Nigel Richard RESIGNED | Director | 12 Oct 1999 | 27 Jul 2001 | | October 1954 | 50 Hillmorton Road, Rugby, Warwickshire, CV22 5AD |
| SIGSWORTH, David, Prof. RESIGNED | Director | 19 Jan 1996 | 31 Mar 2005 | United Kingdom | July 1946 | 9 Station Road, South Queensferry, West Lothian, EH30 9HY |
| SKIPP, Peter Raymer Thomas RESIGNED | Director | 17 Aug 1995 | 12 Dec 1995 | | July 1940 | 81 New Street Hill, Bromley, Kent, BR1 5BA |
| SMITH, Bryan Crossley RESIGNED | Director | | 12 Dec 1995 | | February 1925 | Heron Path House, Wendover, Aylesbury, Buckinghamshire, HP22 6NN |
| SMITH, Glenn RESIGNED | Director | 17 Aug 1995 | 18 Jan 1996 | | December 1959 | 258 Tuddenham Road, Ipswich, Suffolk, IP4 3BH |
| SMITH, James Isaac RESIGNED | Director | 11 Jan 2022 | 02 Feb 2024 | Scotland | March 1962 | Inveralmond House, 200 Dunkeld Road, Perth, PH1 3AQ, United Kingdom |
| SMITH, Paul Richard RESIGNED | Director | 02 Oct 2001 | 16 Jun 2016 | United Kingdom | January 1963 | Grampian House, 200 Dunkeld Road, Perth, PH1 3GH |
| SOUCHARD, Richard Jack RESIGNED | Director | 16 Feb 2004 | 31 Mar 2010 | United Kingdom | July 1954 | Wanborough Springs, Wanborough, Guildford, Surrey, GU3 2JR |
| SOUTHALL, Graham Brinsley RESIGNED | Director | 17 Mar 2007 | 27 Jun 2008 | United Kingdom | July 1965 | 72a Easthampstead Road, Wokingham, RG40 2EE |
| SURRALL, Stephen John RESIGNED | Director | 09 Oct 2009 | 28 May 2010 | England | April 1960 | 'Broadlands', 20 The Avenue, Crowthorne, Berkshire, RG45 6PB, United Kingdom |
| SURRALL, Stephen John RESIGNED | Director | 27 Jul 2001 | 27 Sep 2002 | | April 1960 | 86 Foxcote, Finchampstead, Wokingham, Berkshire, RG40 3PE |
| SUTHERLAND, John Adam RESIGNED | Director | 09 Apr 2008 | 16 Mar 2017 | Scotland | January 1950 | Nether Roslynne, Main Street, Methlick, Ellon, AB41 7DT, Scotland |
| TAYLOR, Philip Raymond RESIGNED | Director | 13 Dec 1995 | 18 Jan 1996 | | November 1946 | Beinn Alligin Crutches Lane, Jordans, Beaconsfield, Buckinghamshire, HP9 2TG |
| TAYLOR, Philip Jonathan RESIGNED | Director | 22 Feb 1994 | 22 May 1995 | United Kingdom | July 1958 | Halfway, Foley Terrace, Malvern, Worcestershire, WR14 4RQ |
| THOMAS, Anthony RESIGNED | Director | 28 Aug 2019 | 31 Mar 2022 | United Kingdom | August 1961 | 200, Dunkeld Road, Perth, PH1 3AQ, Scotland |
| TONG BARNES, Wendy RESIGNED | Director | 30 Oct 2012 | 15 Nov 2023 | Hong Kong | September 1960 | 8/F, Cheung Kong Center, 2 Queen's Road Central, Hong Kong, Hong Kong |
| WELCH, Victor John RESIGNED | Director | | 03 May 1994 | | April 1935 | Hawthorn Lodge, Regil Lane, Winford Bristol, Avon, BS18 8AX |
| WELSH, Brian John RESIGNED | Director | 15 Apr 2010 | 28 May 2010 | United Kingdom | June 1957 | Severn Road, Hallen, Bristol, BS10 7SP |
| WHEELER, Stephen, Mr. RESIGNED | Director | 14 Oct 2019 | 11 Jan 2022 | Ireland | February 1973 | Red Oak South, South County Business Park, Leopardstown, DUBLIN 18, Ireland |
| WILKINS, Roy, Dr RESIGNED | Director | 03 May 1994 | 12 Dec 1995 | | December 1942 | Flat B, 3 Priors Terrace, Tynemouth, Tyne & Wear, NE30 4BE |
| WILLIAMS, Alistair Charles Walter RESIGNED | Director | 12 Jul 2005 | 17 Mar 2007 | England | June 1963 | 6 College Drive, Thames Ditton, Surrey, KT7 0LB |
| WOOLLACOTT, Paul Nicholas RESIGNED | Director | 13 Dec 1995 | 19 Jan 2000 | | October 1947 | Parfitts, Rectory Lane, Aston Tirrold, Oxfordshire, OX11 9DH |
| YOUNG, Arnold Roger Alexander RESIGNED | Director | 19 Jan 1996 | 21 Jan 1999 | | January 1944 | Lossiehall, Liff, Dundee, DD2 5NJ |