| ROBERTSON, Joan Chika, Dr ACTIVE | Secretary | 03 Jul 2014 | | | | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| ALLDIS, Dominic ACTIVE | Director | 04 Dec 2010 | | United Kingdom | April 1962 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| CLARK, Mark Ross, Prof ACTIVE | Director | 30 Oct 2024 | | United Kingdom | April 1951 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| LI, Winny ACTIVE | Director | 05 Aug 2025 | | England | May 1971 | Honey Pot House, Brunswick Court, Fulbourn, Cambridge, CB21 5XN, England |
| OSBORNE, Nigel, Professor/Doctor ACTIVE | Director | 31 Dec 2010 | | United Kingdom | June 1948 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| PINCHING, Anthony John, Prof ACTIVE | Director | 03 Oct 2024 | | England | March 1947 | 22 Cuckoo Hill Road, Cuckoo Hill Road, Pinner, HA5 1AY, England |
| REDFERN, Martin ACTIVE | Director | 03 Jul 2014 | | England | July 1952 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| VIVASH, Neena ACTIVE | Director | 18 Oct 2023 | | England | February 1967 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| WESTLAND, Larry ACTIVE | Director | 04 Dec 2010 | | United Kingdom | June 1937 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| HILL, Richard Graham RESIGNED | Secretary | 06 Aug 2005 | 14 Feb 2008 | | | Top Farm 75 Longton Road, Barlaston, Stoke On Trent, Staffordshire, ST12 9AU |
| ROBERTSON, Joan Chika, Dr RESIGNED | Secretary | 19 Oct 2004 | 06 Aug 2005 | | | The Old Farm House, Hermongers, Rudgwick, Horsham, West Sussex, RH12 3AL |
| GRINDCO SECRETARIES LIMITED RESIGNED | Secretary | 19 Oct 2004 | 19 Oct 2004 | | | C/O Grindeys, Glebe Court, Stoke On Trent, Staffordshire, ST4 1ET |
| FENWICK, Peter Brooke Cadogan, Dr RESIGNED | Director | 04 Sep 2005 | 03 Oct 2024 | England | May 1935 | 42 Herne Hill, London, SE24 9QP |
| GOLDEN, Lewis Lawrence RESIGNED | Director | 05 Feb 2006 | 01 Feb 2010 | United Kingdom | December 1922 | Little Leith Gate, Angel Street, Petworth, West Sussex, GU28 0BG |
| GROB, Paul Richard, Professor RESIGNED | Director | 03 May 2005 | 05 Oct 2024 | United Kingdom | February 1936 | Abbots Garden Eastbury Lane, Compton, Guildford, Surrey, GU3 1EE |
| HILL, Richard Graham RESIGNED | Director | 15 Aug 2006 | 14 Feb 2008 | England | December 1949 | Top Farm 75 Longton Road, Barlaston, Stoke On Trent, Staffordshire, ST12 9AU |
| HILL, Richard Graham RESIGNED | Director | 02 Nov 2004 | 30 Jun 2005 | England | December 1949 | Top Farm 75 Longton Road, Barlaston, Stoke On Trent, Staffordshire, ST12 9AU |
| HILL, Richard Graham RESIGNED | Director | 19 Oct 2004 | 19 Oct 2004 | England | December 1949 | Top Farm 75 Longton Road, Barlaston, Stoke On Trent, Staffordshire, ST12 9AU |
| KINDERSLEY, Juliet Elizabeth RESIGNED | Director | 03 May 2005 | 03 Jul 2014 | United Kingdom | May 1940 | 2 Methley Street, London, SE11 4AJ |
| KINDERSLEY, Peter David RESIGNED | Director | 03 May 2005 | 03 Jul 2014 | United Kingdom | July 1941 | 2 Methley Street, London, SE11 4AJ |
| NORRMAN, Karl Erik, Ambassador RESIGNED | Director | 16 Dec 2005 | 19 May 2026 | Germany | October 1943 | Hohenzollebudaww 81, Berlin, D-17199, FOREIGN, Germany |
| ROBERTSON, Joan Chika, Dr RESIGNED | Director | 06 Aug 2005 | 05 Feb 2006 | England | September 1956 | The Old Farm House, Hermongers, Rudgwick, Horsham, West Sussex, RH12 3AL |
| ROBERTSON, Paul Alan, Prof RESIGNED | Director | 03 Jul 2014 | 27 Oct 2014 | England | November 1952 | Shelley's Barn, Hermongers Lane, Rudgwick, Horsham, West Sussex, RH12 3AL |
| ROBERTSON, Paul Alan, Prof RESIGNED | Director | 19 Oct 2004 | 05 Feb 2006 | England | November 1952 | The Old Farmhouse Hermongers, Rudgwick, Horsham, West Sussex, RH12 3AL |
| TAYLOR, Clara RESIGNED | Director | 04 Sep 2005 | 12 Jul 2010 | United Kingdom | July 1948 | The Bat House, 47 Forehill, Ely, Cambridgeshire, CB7 4AA |
| VIVASH, Hayden Paul RESIGNED | Director | 25 Oct 2009 | 18 Oct 2023 | England | February 1965 | The Old Farmhouse, Hermongers Lane, Rudgwick, Horsham, RH12 3AL, England |
| GRINDCO DIRECTORS LIMITED RESIGNED | Director | 19 Oct 2004 | 02 Nov 2004 | | | C/O Grindeys Solicitors, Glebe Court, Stoke On Trent, Staffordshire, ST4 1ET |