| COULTER, Darryl Hector ACTIVE | Secretary | 12 Nov 2020 | | | | 14th Floor, Broadgate Tower, 20 Primrose Street, London, EC2A 2EW |
| MAERKI, Patric ACTIVE | Director | 06 Sep 2021 | | Switzerland | January 1973 | 14th Floor, Broadgate Tower, 20 Primrose Street, London, EC2A 2EW |
| MALESZEWSKA, Agnieszka Bozena ACTIVE | Director | 19 Jan 2022 | | Poland | June 1982 | 14th Floor, Broadgate Tower, 20 Primrose Street, London, EC2A 2EW |
| BOIN, Nicolas RESIGNED | Secretary | 21 Aug 2014 | 20 Aug 2020 | | | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| DIEGAN, Simon John RESIGNED | Secretary | 01 Aug 1997 | 05 May 2000 | | | 8 Glade Road, Marlow, Buckinghamshire, SL7 1DY |
| HUGHES, Donald James RESIGNED | Secretary | 12 Aug 2013 | 21 Aug 2014 | | | Hitachi Data Systems, Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD, United Kingdom |
| JEFFREY, George Anthony RESIGNED | Secretary | 02 Mar 1993 | 18 Feb 1994 | | | 16 Heathfield Gardens, Chiswick, London, W4 4JY |
| JONES, Owen RESIGNED | Secretary | 03 Oct 2007 | 28 Jul 2008 | | | 67 Houblon Road, Richmond, Surrey, TW10 6DB |
| LANGRIDGE, Hui Min RESIGNED | Secretary | 20 Aug 2020 | 12 Nov 2020 | | | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| PHILLIPS, Mary Kathleen Tanner RESIGNED | Secretary | 01 Jun 2011 | 12 Aug 2013 | | | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| SOULSBY, James Andrew RESIGNED | Secretary | 18 Feb 1994 | 01 Aug 1997 | | | Bramshott Lodge, Woolmer Hill, Haslemere, Surrey, GU27 1QA |
| SOULSBY, James Andrew RESIGNED | Secretary | | 02 Mar 1993 | | | Bramshott Lodge, Woolmer Hill, Haslemere, Surrey, GU27 1QA |
| TROWER, Tara Dawn RESIGNED | Secretary | 04 Nov 2008 | 01 Jun 2011 | | | Millhouse Cottage, Hook Road, North Warnborough, Hook, Hampshire, RG29 1ET, United Kingdom |
| TYNE, Matthew Russell RESIGNED | Secretary | 05 May 2000 | 01 Jun 2007 | | | 17 Mossy Vale, Maidenhead, Berkshire, SL6 7RX |
| BALL, Stephen Mathew RESIGNED | Director | 01 Jun 2011 | 23 Aug 2013 | United Kingdom | December 1969 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| BRADBURY, Richard Paul RESIGNED | Director | 01 Sep 2017 | 24 May 2021 | United Kingdom | March 1970 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| COOMBS, Martin RESIGNED | Director | 03 Oct 2007 | 01 Jun 2011 | England | March 1965 | 67 Altwood Road, Maidenhead, Berkshire, SL6 4PS |
| DIEGAN, Simon John RESIGNED | Director | 03 Jun 1991 | 05 May 2000 | | September 1954 | 8 Glade Road, Marlow, Buckinghamshire, SL7 1DY |
| ERASMUS, Pieter RESIGNED | Director | 22 Feb 2007 | 01 May 2007 | | February 1974 | 7 Anthony Wall, Warfield, Bracknell, Berkshire, RG42 3UL |
| GADD, Richard RESIGNED | Director | 21 Aug 2014 | 24 May 2021 | England | November 1969 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| GIFON, Elena, Ms. RESIGNED | Director | 02 Oct 2018 | 31 Oct 2021 | Switzerland | January 1976 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| HOPPING, Malcolm Richard RESIGNED | Director | 22 Oct 2001 | 18 Feb 2003 | England | March 1946 | 15 Dell Grove, Frimley, Camberley, Surrey, GU16 5PZ |
| HURST, Peter RESIGNED | Director | | 28 May 1991 | | January 1954 | Nuthatch, The Glen, Pamber Heath, Basingstoke Hants, RG26 6DY |
| JAQUES, Stephen Richard RESIGNED | Director | 03 Jun 1991 | 15 Oct 1999 | United Kingdom | March 1948 | Greenmount Cottage, Shalden, Alton, Hampshire, GU34 4DU |
| MARFLEET, David RESIGNED | Director | 31 Jan 1999 | 30 Nov 2006 | United Kingdom | January 1955 | 15 Magnolia Dene, Hazlemere, High Wycombe, Buckinghamshire, HP15 7QE |
| METCALFE, Richard Crosby, Mr. RESIGNED | Director | | 31 Jan 1999 | United Kingdom | March 1950 | Ryehill Cottage, Lyndhurst Road, Beaulieu, Hampshire, SO42 7YE |
| MORRISON, Barry Scott RESIGNED | Director | 21 Aug 2014 | 31 May 2016 | England | February 1960 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| MURPHY, Stephen RESIGNED | Director | 16 Sep 2013 | 21 Aug 2014 | United Kingdom | May 1967 | 1, The Manor House, The Green, Datchet, Berkshire, SL3 9EL, United Kingdom |
| MURPHY, Stephen RESIGNED | Director | 13 Jun 2007 | 17 Jan 2011 | United Kingdom | May 1967 | 17 Sherbourne Drive, Windsor, Berkshire, SL4 4AE |
| PEGRUME, Thomas Maitland RESIGNED | Director | 24 May 2021 | 31 Mar 2022 | United Kingdom | December 1959 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD |
| POULSEN, Bjarne RESIGNED | Director | 01 Feb 2000 | 20 Oct 2001 | | February 1950 | Armitage Court House, St Marys Hill, Sunninghall, Berkshire, SL5 9AU |
| ROBERSON, David RESIGNED | Director | 01 Nov 1999 | 15 Jan 2007 | | September 1954 | 750 Central Expressway, California, Santa Clara, 95050-2627, Usa |
| SHORT, Alistair Andrew Dorian RESIGNED | Director | 21 Oct 1998 | 31 Mar 2000 | | October 1956 | 26000 Rancho Manuella Lane, Los Altos Hills, Santa Clara 94022, Usa |
| SOULSBY, James Andrew RESIGNED | Director | 20 Nov 1995 | 03 Mar 1997 | England | August 1956 | Bramshott Lodge, Woolmer Hill, Haslemere, Surrey, GU27 1QA |
| SPRING, Andrew John RESIGNED | Director | 01 Jun 2011 | 06 Apr 2017 | United Kingdom | July 1970 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| SVENNINGSEN, Niels Holst RESIGNED | Director | 01 Jun 2011 | 30 Nov 2013 | Denmark | December 1964 | Sefton Park, Stoke Poges, Buckinghamshire, SL2 4HD, England |
| TAFFINDER, John Perry RESIGNED | Director | 01 Nov 1999 | 31 Dec 2004 | United Kingdom | June 1948 | Eastgate House, 65 Onslow Road, Walton On Thames, Surrey, KT12 5AZ |
| TYNE, Matthew Russell RESIGNED | Director | 05 May 2000 | 01 Jun 2007 | | September 1971 | 17 Mossy Vale, Maidenhead, Berkshire, SL6 7RX |
| VAETH, Michael RESIGNED | Director | 22 Feb 2007 | 01 Jun 2011 | Germany | December 1960 | Oskar-Stahl.Str.6, Haibach 63808, Germany |
| WALKER, Brian John RESIGNED | Director | | 21 Oct 1998 | | February 1941 | 18691 Allendale Avenue, Saratoga, California, 95070, Usa |
| WALLER, Peter Charles RESIGNED | Director | | 21 Jul 1995 | | August 1946 | 2 Crediton Hill, Hampstead, London, NW6 1HP |