| HUGHES, Ceri Louise ACTIVE | Secretary | 09 Jun 2026 | | | | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| NICHOLAS, Daniel Marc ACTIVE | Director | 01 Mar 2026 | | Wales | October 1982 | 3, Wild Field, Bridgend, CF31 5FF, Wales |
| STRATMANN, Andreas, Dr ACTIVE | Director | 10 Jan 2018 | | Germany | March 1968 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| HILL, Julia RESIGNED | Secretary | | 05 Nov 1998 | | | Ty Trisant, 3 Llys Derwen Penygawsi, Llantrisant, Mid Glamorgan, CF72 8QB |
| JONES, Margaret Jane RESIGNED | Secretary | 05 Nov 1998 | 29 Apr 1999 | | | 11 Heol Dyfed, Beddau, Pontypridd, Rhondda Cynon Taff, CF38 2SX, Wales |
| RICHARDS, Michael Johnston RESIGNED | Secretary | 29 Apr 1999 | 25 Aug 1999 | | | Penmyarth Cottage Gliffaes Road, Crickhowell, Powys, NP8 1RN |
| WEBER, John Stuart RESIGNED | Secretary | 30 Jul 1999 | 13 Feb 2018 | | | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| CASPERS, Michael, Doctor RESIGNED | Director | 10 Apr 2002 | 07 Apr 2009 | | May 1957 | Ahornstrasse 56, Weinheim, 69463, Germany |
| CONNOLLEY, Damian RESIGNED | Director | 10 Apr 2002 | 31 May 2007 | | March 1961 | 74 The Sand Wharf, Jim Driscoll Way, Cardiff, CF11 7JA |
| DAVID, Josef RESIGNED | Director | | 19 Oct 2001 | | January 1951 | Weissenburger Strasse 31, 76829 Landau, Germany, FOREIGN |
| EDWARDS, Huw Geraint RESIGNED | Director | 17 Oct 2012 | 30 Jun 2026 | Wales | August 1960 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| GERD, Baader RESIGNED | Director | | 31 Dec 1994 | | July 1943 | Ahornweg 3, 6730 Neustadt, FOREIGN, West Germany |
| HILL, Kenneth Raymond RESIGNED | Director | | 26 Jul 2000 | | January 1944 | Ty Trisant, 3 Llys Derwen Penygawsi, Llantrisant, Mid Glamorgan, CF72 8QB |
| HOPKIN, Ian David, Dr RESIGNED | Director | 01 Jun 2007 | 23 Mar 2022 | Wales | February 1961 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| HOPKIN, Ian David, Dr RESIGNED | Director | 04 Oct 2002 | 02 Jul 2004 | Wales | February 1961 | Fern Lodge, Llanquian Road, Aberthin, Cowbridge, Vale Of Glamorgan, CF71 7HE |
| JONES, Stephen Royston RESIGNED | Director | 08 Dec 1999 | 31 Mar 2006 | United Kingdom | December 1966 | 10 Caynham Avenue, Penarth, Vale Of Glamorgan, CF64 5RR |
| JONES, William Peter RESIGNED | Director | 06 Jun 2008 | 30 Jun 2017 | Wales | January 1958 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| LEWIS, Michael John RESIGNED | Director | 14 Sep 2007 | 15 Jun 2018 | Wales | April 1964 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| REILING, Norbert Johannes RESIGNED | Director | 07 Apr 2009 | 01 Jun 2017 | Germany | January 1962 | Unit 11, Llantrisant Business Park, Llantrisant, Mid Glamorgan, CF72 8LF |
| RICHARDS, Michael Johnston RESIGNED | Director | 05 Nov 1998 | 18 May 2004 | | May 1940 | The Old Coach House, Gwernvale, Crickhowell, Powys, NP8 1SE |