| ANBERREE, Caroline ACTIVE | Director | 16 Feb 2017 | | Belgium | July 1970 | Rue Du Tavail 6, Nivelles, 1400, Belgium |
| FLOREAN, Gregory Gianni Vivian ACTIVE | Director | 01 Jan 2015 | | Belgium | October 1982 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| HORVATH, Eniko ACTIVE | Director | 21 May 2024 | | Belgium | June 1982 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| ACKERMAN, Paul RESIGNED | Secretary | 20 May 2013 | 25 Aug 2016 | | | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| BINKLEY, Daniel Bruce RESIGNED | Secretary | 09 May 2005 | 09 Jul 2010 | | | 3809 South Aster Avenue, Broken Arrow, Oklahoma 74011, Usa |
| BOWMAN, Kim RESIGNED | Secretary | 26 Mar 2002 | 09 Jul 2010 | | | 6602 S 32 W Avenue, Tulsa, Tulsa County, 74132, Usa |
| GROSSAR, Jean-Paul, Business Executive RESIGNED | Secretary | | 30 Oct 1991 | | | Rue De Lane Fontaine 2b, 1370 St Remy Geest, FOREIGN, Belgium |
| HULENA, Kaye RESIGNED | Secretary | 27 Mar 2002 | 30 Apr 2013 | | | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| JACK, Andrew Martin Carmichael RESIGNED | Secretary | 01 Nov 1991 | 03 May 1996 | | | 5 Queens Retreat, Cheltenham, Gloucestershire, GL51 8NT |
| SAMOFF, Pete William RESIGNED | Secretary | 19 Mar 1999 | 09 May 2005 | | | 5715 West Orlando Circle, Broken Arrow Oklahoma, Tulsa County 74012, Usa |
| SHOMAKER, Thomas RESIGNED | Secretary | 04 May 1996 | 19 Mar 1999 | | | 12206 S. 18th. Ave., Jenks, Oklahoma, 74037, America |
| ACKERMAN, Paul James RESIGNED | Director | 01 Jan 2015 | 25 Aug 2016 | United Kingdom | April 1978 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| BINKLEY, Daniel Bruce RESIGNED | Director | 09 May 2005 | 25 Nov 2013 | Usa | November 1957 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| BOLT, Jack RESIGNED | Director | 01 Jun 1998 | 25 Jun 2001 | | November 1949 | 8506 East 61st Street, Tulsa 74133 Oaklahoma, United States America |
| BORUCKI, Andre RESIGNED | Director | 01 Feb 2008 | 31 May 2010 | | April 1964 | 6, Rue Du Travail, Nivelles, 1400, Belgium |
| CHAVES DE SOUSA, Nuno Miguel RESIGNED | Director | 20 Jul 2010 | 24 Jun 2011 | Belgium | June 1970 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| DA SILVA MENDONCA, Paula Alexandra RESIGNED | Director | 01 Feb 2008 | 15 Jan 2016 | Belgium | April 1964 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| DESAEGHER, Johan Guillaume Solange RESIGNED | Director | 01 Jan 2015 | 06 Sep 2019 | Belgium | November 1968 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| ELIOT, Judy RESIGNED | Director | 26 Jul 2006 | 24 Aug 2009 | | May 1954 | 1764 East 30th Street, Tulsa, Oklahoma, Usa |
| GROSSAIR, Jean-Paul, Business Executive RESIGNED | Director | | 30 Oct 1991 | | April 1950 | Rue De Lane Fontaine 2b, 1370 St Remy Geest |
| HALL, Michael, Director/Business Executive RESIGNED | Director | 12 May 1992 | 14 Jan 1994 | | May 1944 | 7438e 68th Place, Tulsa, Oklahoma 74133, Usa |
| HARRIS, Derek Edward RESIGNED | Director | 01 Jun 1998 | 05 Apr 2004 | | July 1944 | Cherrystones Grange Road, Cookham, Maidenhead, Berkshire, SL6 9TH |
| JACK, Andrew Martin Carmichael RESIGNED | Director | 15 Feb 2008 | 10 Mar 2009 | Uk | October 1963 | Butts House, Dartley Farm, Middle Duntisbourne, Cirencester, Gloucestershire, GL7 7JH, Uk |
| MAJOR, Jon RESIGNED | Director | 25 Mar 2003 | 09 May 2005 | | July 1957 | 8920 South College Pla Ce, Tulsa, Tulsa Ok 74137, America |
| MCGREW, Robert Doyle RESIGNED | Director | 09 May 2005 | 10 Dec 2015 | United States | July 1962 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| MEDFORD, Stuart John RESIGNED | Director | 03 May 2004 | 01 Jan 2008 | | May 1955 | 7, Tintern Heights, Catbrook, Monmouthshire, NP16 6NH |
| PAYNE, Larry RESIGNED | Director | 25 Jun 2001 | 25 Mar 2003 | | November 1946 | 2227 E. 24th St, Tulsa Ok, Oklahoma 74114, Usa |
| PEARCE, Richard Michael RESIGNED | Director | 09 Jul 2010 | 30 Apr 2015 | United Kingdom | July 1967 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| PECHE, Andre, Business Executive RESIGNED | Director | | 16 Jan 1992 | | December 1930 | 28 Riddek Dessainlaan, 2800 Mechelen, FOREIGN, Belgium |
| SAMOFF, Pete RESIGNED | Director | 01 Jun 1998 | 09 May 2005 | | September 1941 | 8506 East 61st Street, Tulsa 74133 Oklahoma, United States America |
| SHOMAKER, Thomas RESIGNED | Director | 14 Jan 1994 | 19 Mar 1999 | | September 1946 | 12206 S. 18th. Ave., Jenks, Oklahoma, 74037, America |
| SIEBEL, Anja RESIGNED | Director | 09 Jul 2010 | 31 Dec 2014 | Belgium | August 1968 | 6, Rue Du Travail, Nivelles, Brabant-Wallon, 1400, Belgium |
| SIMON, John Edward RESIGNED | Director | 24 Jun 2002 | 08 Jan 2004 | | May 1958 | 5 Fallow Field Close, Chippenham, Wiltshire, SN14 6YA |
| THAMES, Bruce Alan RESIGNED | Director | 09 Jul 2010 | 30 Apr 2015 | United Kingdom | February 1963 | Faraday Road, Dorcan Way, Swindon, Wilts, SN3 5HF |
| VANSCHANDEVIJL, Jean-Paul, Business Executive RESIGNED | Director | | 31 Jul 2004 | | December 1947 | Vollezellestraat 71, Detingen 1551, FOREIGN, Belgium |
| WILLIAMSON, Richard B, Business Executive RESIGNED | Director | | 09 Jul 2010 | | March 1943 | 1230 Hazel Blvd, Tulsa, Oklahoma 74114, U S A |
| WILSON, Jeffrey Monroe RESIGNED | Director | 11 May 2020 | 21 May 2024 | Belgium | February 1975 | Faraday Road, Dorcan Way, Swindon, Wiltshire, SN3 5HF, United Kingdom |