| ALEXANDER, John Philip ACTIVE | Director | 14 Jul 2021 | | United Kingdom | October 1975 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| ARTHUR, Beverley Jean ACTIVE | Director | 26 Mar 2024 | | Scotland | October 1974 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| CAVE, Paul Andrew ACTIVE | Director | 16 Jan 2019 | | United Kingdom | October 1978 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| CHRISTIE, Lee ACTIVE | Director | 17 May 2022 | | England | July 1976 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| CLASON, William ACTIVE | Director | 16 Feb 2026 | | Wales | June 1958 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| GETSON, Shaun James ACTIVE | Director | 22 Jul 2019 | | England | December 1966 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| HALL, Fraser ACTIVE | Director | 22 Mar 2018 | | United Kingdom | October 1990 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| HODGE, Andrew John ACTIVE | Director | 27 Aug 2024 | | England | March 1965 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| MACKENNA, Robert Anthony ACTIVE | Director | 23 Feb 2026 | | United Kingdom | September 1976 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| RYAN, Neil Patrick ACTIVE | Director | 01 Mar 2022 | | England | March 1967 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| SYCAMORE, Janet ACTIVE | Director | 18 Nov 2021 | | England | September 1966 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| WORMUTH, Ernst Werner ACTIVE | Director | 03 Jan 2023 | | Germany | September 1963 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| YOUNG, Stephen John ACTIVE | Director | 22 Mar 2018 | | United Kingdom | April 1949 | Office 3 Harrison Suite, The Nostell Estate, Nostell, Wakefield, West Yorkshire, WF4 1AB, England |
| ANDREWS, Richard Ison RESIGNED | Secretary | 18 Oct 2005 | 05 May 2006 | | | Lower Cefn Dulas, Ewyas Harold, Hereford, Herefordshire, HR2 0JH |
| COGGINS, Christopher Robin, Dr RESIGNED | Secretary | 09 Jun 2006 | 31 Mar 2009 | | | Flat 7, 4 Clarence Drive, Harrogate, North Yorkshire, HG1 2PN |
| SYCAMORE, Janet RESIGNED | Secretary | 11 Jul 2018 | 19 Nov 2021 | | | 4, Rectory Court, Kirk Smeaton, Pontefract, WF8 3SP, England |
| YOUNG, Stephen John RESIGNED | Secretary | 01 Apr 2009 | 11 Jul 2018 | | | Shambles Cottage, Rigton Hill, North Rigton, North Yorkshire, LS17 0DJ, United Kingdom |
| ALEXANDER, Jonathan Philip RESIGNED | Director | 07 Oct 2008 | 18 Mar 2010 | United Kingdom | October 1975 | 4, Heatherdene Road, West Kirby, Wirral, CH48 4EU, United Kingdom |
| BLYTH, Graham RESIGNED | Director | 01 Dec 2015 | 16 Dec 2024 | United Kingdom | August 1963 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| BRENNAN, James Gary RESIGNED | Director | 01 Jan 2021 | 26 Mar 2024 | United Kingdom | September 1992 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| BREYNE, Stephan Erik, Dr RESIGNED | Director | 01 May 2011 | 06 Mar 2019 | Sweden | October 1956 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| BROWNLIE, Alexander George RESIGNED | Director | 01 Dec 2012 | 31 Dec 2018 | Scotland | November 1971 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| CASHMAN, Timothy Augustine RESIGNED | Director | 18 Mar 2010 | 08 Mar 2012 | United Kingdom | March 1960 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| CHALMERS, Ian Michael RESIGNED | Director | 23 May 2006 | 30 Jul 2012 | United Kingdom | December 1951 | 30 Orchard Close, Donington, Spalding, Lincolnshire, PE11 4TY |
| CLASON, William RESIGNED | Director | 23 May 2006 | 01 Dec 2019 | Wales | June 1958 | 44 The Nurseries, Langstone, Newport, South Wales, NP18 2NT |
| COGGINS, Christopher Robin, Dr RESIGNED | Director | 18 Dec 2008 | 31 Dec 2024 | England | October 1945 | Flat 7, 4 Clarence Drive, Harrogate, North Yorkshire, HG1 2PN |
| COGGINS, Christopher Robin, Dr RESIGNED | Director | 18 Oct 2005 | 05 May 2006 | England | October 1945 | Flat 7, 4 Clarence Drive, Harrogate, North Yorkshire, HG1 2PN |
| CUNNINGHAM, Neil Robin RESIGNED | Director | 30 Jun 2023 | 27 Aug 2024 | Scotland | November 1972 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| EGGLESTON, Edward Mark RESIGNED | Director | 01 Jun 2011 | 09 Nov 2020 | England | October 1967 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| EWBANK, Gordon Andrew RESIGNED | Director | 23 May 2006 | 31 Dec 2023 | England | July 1956 | 128 Church Road, Wheatley, Oxford, OX33 1LU |
| FITZSIMONS, Peter Joseph, Dr RESIGNED | Director | 08 Mar 2012 | 18 Jan 2019 | United Kingdom | March 1958 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| FITZSIMONS, Peter Joseph, Dr RESIGNED | Director | 18 Mar 2010 | 14 Jul 2011 | United Kingdom | March 1958 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| GREEN, Martin John RESIGNED | Director | 01 May 2018 | 01 Apr 2021 | Germany | April 1966 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW |
| HENRY, Simon Nicholas RESIGNED | Director | 01 Jan 2025 | 31 Jul 2025 | England | September 1961 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| HENRY, Simon Nicholas RESIGNED | Director | 04 Feb 2021 | 30 Nov 2023 | England | September 1961 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| HODGE, Andrew John RESIGNED | Director | 15 Sep 2021 | 21 Jun 2023 | England | March 1965 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| HUGHES, Andrew Stewart, Dr RESIGNED | Director | 18 Mar 2010 | 25 Feb 2016 | Uk | November 1964 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| KELLY, Anthony William, Dr RESIGNED | Director | 23 May 2006 | 14 Sep 2021 | United Kingdom | February 1963 | 5 Talybont Grove, Ingleby Barwick, Cleveland, TS17 5EH |
| MACLEOD, Hamish RESIGNED | Director | 06 Mar 2019 | 11 Mar 2021 | Scotland | March 1956 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW |
| PITMAN, Andrew John, Dr RESIGNED | Director | 01 Dec 2020 | 01 Jun 2021 | England | March 1967 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| RYAN, Neil Patrick RESIGNED | Director | 23 May 2006 | 17 Mar 2011 | England | March 1967 | 7 Hall Farm Close, Riccall, York, Yorkshire, YO19 6NT |
| SCHMITT, Stefan, Dr.-Ing. RESIGNED | Director | 01 Apr 2021 | 17 May 2022 | Germany | May 1968 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| SCHULZ, Ralf, Dr RESIGNED | Director | 29 Jan 2019 | 31 Dec 2022 | Germany | June 1967 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| SECKER, John William RESIGNED | Director | 01 Apr 2012 | 25 Nov 2022 | England | October 1967 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| SHIELLS, John Scott RESIGNED | Director | 22 Feb 2023 | 10 Jan 2024 | Scotland | May 1967 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| SMITH, Andrew Hamish RESIGNED | Director | 01 Mar 2011 | 14 Mar 2013 | United Kingdom | March 1957 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW, Uk |
| SMITH, Michael Jonathan RESIGNED | Director | 16 Dec 2024 | 12 Feb 2026 | Scotland | March 1966 | Office 5 Rear Walled Garden, The Nostell Estate, Nostell, Wakefield, WF4 1AB, England |
| UPHILL, Stephen James, Dr RESIGNED | Director | 29 May 2019 | 19 Nov 2020 | United Kingdom | August 1980 | 5c, Flemming Court, Castleford, West Yorkshire, WF10 5HW |
| WALTERS, Peter David RESIGNED | Director | 23 May 2006 | 27 Mar 2008 | | February 1947 | The Vicarage, Back Lane Clive, Shrewsbury, Salop, SY4 3LA |
| YOUNG, Stephen John RESIGNED | Director | 23 May 2006 | 14 Mar 2013 | United Kingdom | April 1949 | 33 Priory Street, York, YO1 6ET |