| HUGHES, Gary Nigel ACTIVE | Secretary | 14 Jan 2026 | | | | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| BUNKER-JAMES, Graeme ACTIVE | Director | 14 Jan 2026 | | England | June 1974 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| COURTENEY-HARRIS, Richard John ACTIVE | Director | 01 Jul 2025 | | United Kingdom | October 1957 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| DAVIES, Stephen ACTIVE | Director | 28 Jul 2020 | | England | April 1959 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| GIBSON, Elizabeth Alexandra Ross ACTIVE | Director | 25 Oct 2023 | | England | March 1979 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| KYTE, Wayne Alan ACTIVE | Director | 11 Jun 2024 | | England | November 1960 | 9, Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| LANGER, Graham Philip ACTIVE | Director | 21 Jan 2017 | | England | January 1961 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| ROE, Paul James ACTIVE | Director | 05 Aug 2026 | | England | April 1974 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| WALKER, James Christopher ACTIVE | Director | 04 Apr 2014 | | England | October 1943 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| WELSH, Martin Brian ACTIVE | Director | 15 Jan 2025 | | Scotland | April 1983 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| BURGESS, David Erwyn RESIGNED | Secretary | 12 Jan 2002 | 21 Jan 2019 | | | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| KIRKMAN, Ivor James Sellers RESIGNED | Secretary | 06 Oct 1993 | 15 Aug 1995 | | | Silver Birches, 8 Armour Close, Burbage, Leicestershire, LE10 2QW |
| PALMER, Frank Stuart RESIGNED | Secretary | 12 Aug 1991 | 06 Oct 1993 | | | 81 Chandler Court, Addistone Cottage Jesmond, Newcastle Upon Tyne, Tyne & Wear, NE2 2HS |
| VOGE, Anthony Wreford Bothwell RESIGNED | Secretary | 15 Aug 1995 | 12 Jan 2002 | | | 5 March Pines, Craigcrook Road, Edinburgh, EH4 3PF |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 12 Aug 1991 | 12 Aug 1991 | | | 26, Church Street, London, NW8 8EP |
| ALLATT, Mark Colin RESIGNED | Director | 11 Sep 1994 | 20 Dec 2021 | England | November 1965 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| BEDDING, David Charles RESIGNED | Director | 11 Sep 2004 | 15 Sep 2007 | Great Britain | February 1945 | 7 Moorhouse Drive, Birkenshaw, West Yorkshire, BD11 2BB |
| BRUCE, Paul Andrew RESIGNED | Director | 11 Dec 2017 | 11 Oct 2023 | England | February 1961 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| BUNKER, Graeme RESIGNED | Director | 15 May 2004 | 09 Nov 2023 | England | June 1974 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| BURGESS, David Erwyn RESIGNED | Director | 24 Jan 2004 | 21 Jan 2019 | Guernsey | April 1948 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| CHAMPION, David RESIGNED | Director | 12 Aug 1991 | 15 Jul 2000 | United Kingdom | August 1948 | 3 Espley Court, Espley, Morpeth, Northumberland, NE61 3EX |
| COURTENEY-HARRIS, Richard John RESIGNED | Director | 31 Dec 2020 | 05 May 2025 | United Kingdom | October 1957 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| DOW, Andrew Richard George RESIGNED | Director | 12 Nov 1994 | 11 Sep 2004 | England | December 1943 | Wyverns, Newton On Ouse, York, YO30 2BR |
| ELLIOTT, David Andrew RESIGNED | Director | 21 Jun 2009 | 18 Nov 2020 | England | March 1951 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| ELLIOTT, David Andrew RESIGNED | Director | 07 Oct 1993 | 17 Jul 1999 | | March 1951 | 55 Lynher Drive, Saltash, Cornwall, PL12 4PA |
| FANNING, Michael RESIGNED | Director | 15 Jan 1994 | 26 Mar 1994 | | September 1947 | 3 Lindrick Close, Bessacar, Doncaster, South Yorkshire, DN4 7JJ |
| GLADDERS, John Michael RESIGNED | Director | 12 Aug 1991 | 07 Oct 1993 | | November 1951 | 9 Grenville Way, Whitley Bay, Tyne & Wear, NE26 3JJ |
| LARKE, Cedric Maurice John RESIGNED | Director | 15 May 2004 | 01 Oct 2007 | England | September 1940 | 8 Ouse Road, St. Ives, Cambridgeshire, PE27 3FT |
| LORD, Gillian RESIGNED | Director | 21 Nov 2009 | 22 Nov 2016 | England | May 1953 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| MCDONALD, Benjamin Mark RESIGNED | Director | 31 Dec 2020 | 28 Nov 2025 | England | January 1990 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| MORLAND, Robert John RESIGNED | Director | 20 Jan 2007 | 15 Dec 2018 | England | February 1955 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| MORLAND, Robert John RESIGNED | Director | 29 Jul 1995 | 24 Jan 2004 | England | February 1955 | 1 Mortlock Close, Melbourn, Hertfordshire, SG8 6DA |
| NICHOLAS, Graham Thomas Richard RESIGNED | Director | 24 Jan 2004 | 16 Nov 2013 | England | May 1964 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| PALMER, Frank Stuart RESIGNED | Director | 12 Aug 1991 | 18 Mar 2001 | England | August 1948 | 81 Chandler Court, Addistone Cottage Jesmond, Newcastle Upon Tyne, Tyne & Wear, NE2 2HS |
| PARKER, Huw Jonathan RESIGNED | Director | 16 Nov 2018 | 31 Dec 2023 | England | April 1962 | Darlington Locomotive Works, 9 Bonomi Way, Darlington, County Durham, DL3 0PY, England |
| ROCHE, Anthony Douglas RESIGNED | Director | 09 Mar 2002 | 03 Jun 2003 | United Kingdom | August 1943 | 98 High Street, Odell, Bedfordshire, MK43 7AS |
| ROSS, Duncan RESIGNED | Director | 13 May 2006 | 04 Apr 2008 | | September 1942 | Green Mice Cottage, Catterick Village, Richmond, Yorkshire, DL10 7LU |
| STOTT, Alexandra Jane RESIGNED | Director | 17 May 2008 | 05 Jan 2015 | England | November 1965 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |
| VOGE, Anthony Wreford Bothwell RESIGNED | Director | 07 Oct 1993 | 02 May 2008 | | November 1927 | 5 March Pines, Craigcrook Road, Edinburgh, EH4 3PF |
| WILSON, Barry RESIGNED | Director | 07 Oct 1993 | 29 Aug 2013 | Jersey | February 1946 | Darlington Locomotive Works, Hopetown Lane, Darlington, County Durham, DL3 6RQ |