| SMALLEY, Michael, Dr ACTIVE | Director | 25 Feb 2015 | | United Kingdom | November 1958 | Dundas & Wilson Cs Llp, Saltire Court, 20 Castle Terrace, Edinburgh, Scotland, EH1 2EN |
| WILLIAMS, Benjamin ACTIVE | Director | 21 Mar 2022 | | United Kingdom | June 1986 | The Akzonobel Building, Wexham Road, Slough, SL2 5DS, United Kingdom |
| CARTER, Lynette Jean Cherryl RESIGNED | Secretary | 14 Jun 2017 | 31 May 2018 | | | The Akzonobel Building, Wexham Road, Slough, SL2 5DS, United Kingdom |
| CHEATLE, Penelope Anne RESIGNED | Secretary | 01 Jul 1999 | 18 Aug 2000 | | | 19 Wellsmoor Gardens, Bickley, Kent, BR1 2HT |
| CLARK, Lynda RESIGNED | Secretary | 11 Dec 1992 | 01 Jul 1999 | | | 2 Melton Road, Runcorn, Cheshire, WA7 4AH |
| HARDIE, David RESIGNED | Secretary | 01 Dec 1991 | 11 Dec 1992 | | | 15 Howard Place, Edinburgh, EH3 5JZ |
| HORLOCK, Elizabeth Ann RESIGNED | Secretary | 16 Jul 2007 | 12 Jun 2008 | | | 1 Barringer Court, London Street, Godmanchester, Huntingdon, Cambs, PE29 2HU |
| IRVINE, Scott Macdonald RESIGNED | Secretary | 14 Nov 2001 | 19 Jan 2004 | | | 69 Streatham Court, Streatham High Road, London, SW16 1DJ |
| KING, Ian RESIGNED | Secretary | 12 Feb 1990 | 01 Dec 1991 | | | 4 Liddesdale Place, Edinburgh, Midlothian, EH3 5JW |
| ROSS, Ian Alexander RESIGNED | Secretary | | 12 Feb 1990 | | | 77 Nether Currie Crescent, Currie, Midlothian, EH14 5JH |
| TURNER, George St John RESIGNED | Secretary | 18 May 2007 | 16 Jul 2007 | | | The Manse, Main Street, Bythorn, Cambridgeshire, PE28 0QR |
| WHITESIDE, Sonia Jane RESIGNED | Secretary | 18 Aug 2000 | 14 Nov 2001 | | | 139 Amhurst Road, London, E8 2AW |
| WINCHESTER, Emma RESIGNED | Secretary | 19 Jan 2004 | 18 May 2007 | | | The Coach House, 173a Merton Road, London, SW19 1EE |
| O.H. SECRETARIAT LIMITED RESIGNED | Secretary | 12 Jun 2008 | 14 Jun 2017 | | | The Akzonobel Building, Wexham Road, Slough, SL2 5DS, United Kingdom |
| ATKINS, Kenneth Thomas George RESIGNED | Director | | 03 Apr 1992 | | December 1933 | 2 Mount Parade, York, YO2 4AP |
| ATTRILL, Geoffrey George RESIGNED | Director | 11 Dec 1992 | 20 Sep 1998 | | April 1954 | Ellwood, Cross Tree Lane, Hawarden, Deeside, CH5 3PY |
| BAKER, John Stewart Lawson RESIGNED | Director | | 19 Apr 1991 | | December 1943 | Norfolk Lodge 114 Richmond Hill, Richmond, Surrey, TW10 6RJ |
| CHEATLE, Penelope Anne RESIGNED | Director | 31 Oct 2000 | 18 Dec 2009 | | August 1953 | C/O Kpmg, Saltire Court, 20 Castle Terrace, Edinburgh, EH1 2EG |
| CHEATLE, Penelope Anne RESIGNED | Director | 01 Jul 1999 | 18 Aug 2000 | | August 1953 | 19 Wellsmoor Gardens, Bickley, Kent, BR1 2HT |
| CLARK, Lynda RESIGNED | Director | 11 Dec 1992 | 01 Jul 1999 | | July 1949 | 2 Melton Road, Runcorn, Cheshire, WA7 4AH |
| DEVIN, Mark RESIGNED | Director | 18 Aug 2000 | 31 Oct 2000 | | April 1959 | 2 The Green, Bishops Stortford, Hertfordshire, CM23 3ER |
| DINNAGE, Louise Margaret RESIGNED | Director | 20 Apr 2015 | 21 Mar 2022 | United Kingdom | November 1970 | Clyde & Co, Albany House, 58 Albany Street, Edinburgh, Scotland, EH1 3QR, Scotland |
| ECKERSALL, Richard Norman RESIGNED | Director | | 31 Dec 1992 | | June 1939 | 15-17 Lanark Road West, Currie, Midlothian, EH14 5ES |
| FREW, Alan Dalziel RESIGNED | Director | 11 Dec 1992 | 31 Oct 1993 | | September 1948 | The White House, Chinnor Road, Bledlow Ridge, Buckinghamshire, HP14 4AA |
| GROSSET, Margaret Wilhelmina RESIGNED | Director | 01 Jul 1999 | 18 Aug 2000 | | October 1951 | 7 Arnprior Place, Alloway, Ayrshire, KA7 4PT |
| GWYNNE-JONES, Andrew Keith RESIGNED | Director | 04 Jul 1994 | 12 Jul 1999 | | November 1963 | Ellinor House, Front Street Hutton Henry, Hartlepool, Cleveland, TS27 4RH |
| HORLOCK, Elizabeth Ann RESIGNED | Director | 16 Jul 2007 | 12 Jun 2008 | | October 1979 | 1 Barringer Court, London Street, Godmanchester, Huntingdon, Cambs, PE29 2HU |
| IRVINE, Scott Macdonald RESIGNED | Director | 14 Nov 2001 | 19 Jan 2004 | | February 1973 | 69 Streatham Court, Streatham High Road, London, SW16 1DJ |
| KAY, John Lawrence RESIGNED | Director | 01 Apr 1994 | 20 Sep 1998 | England | April 1950 | Wabun Garbutts Lane, Hutton Rudby, Yarm, Cleveland, TS15 0DL |
| KING, Deryk Irving RESIGNED | Director | 31 Jul 1991 | 31 Dec 1992 | | December 1947 | Handley Cross Leven Bank, Yarm, Cleveland, TS15 9JL |
| MARSDEN, Paul RESIGNED | Director | | 31 Jul 1991 | | February 1934 | The Croft, Clack Lane, Osmotherly, Northallerton, North Yorkshire, DL6 3PP |
| PATON, Nigel Robert RESIGNED | Director | 01 Feb 1994 | 04 Jul 1994 | | August 1957 | 19 Broadwell Court, Newcastle Upon Tyne, Tyne & Wear, NE3 1YS |
| REID, Robert Mackenzie Cowan RESIGNED | Director | | 30 Jun 1991 | | February 1936 | Jalala 18 West Harbour Road, Charlestown, Dunfermline, Fife, KY11 3ET |
| SHOVLIN, Thomas Anthony RESIGNED | Director | 01 Jan 1998 | 20 Sep 1998 | | December 1946 | 23 Forest Lane, Kirklevington, Yarm, Cleveland, TS15 9LX |
| TONGE, Malcolm RESIGNED | Director | 01 Dec 1998 | 31 Dec 1999 | | January 1953 | 65 Belmont Avenue, Brookfield, Middlesbrough, Cleveland, TS5 8EW |
| TONKS, Clive Edwards RESIGNED | Director | 31 Jul 1991 | 31 Dec 1992 | | July 1945 | Woodlands, Newby, Middlesbrough, Cleveland, TS8 0AH |
| TURNER, David Allan, Mr. RESIGNED | Director | 18 Dec 2009 | 20 Apr 2015 | United Kingdom | November 1971 | 26th, Floor, Portland House Bressenden Place, London, SW1E 5BG, United Kingdom |
| TURNER, George St John RESIGNED | Director | 18 May 2007 | 16 Jul 2007 | | February 1971 | The Manse, Main Street, Bythorn, Cambridgeshire, PE28 0QR |
| WELCH, Michael James RESIGNED | Director | 01 Apr 1994 | 31 Dec 1997 | | July 1943 | The Dolphins, Knayton, Thirsk, North Yorkshire, YO7 4AZ |
| WHITESIDE, Sonia Jane RESIGNED | Director | 18 Aug 2000 | 14 Nov 2001 | | March 1971 | 139 Amhurst Road, London, E8 2AW |
| WINCHESTER, Emma RESIGNED | Director | 19 Jan 2004 | 18 May 2007 | | June 1977 | The Coach House, 173a Merton Road, London, SW19 1EE |
| O.H. DIRECTOR LIMITED RESIGNED | Director | 12 Jun 2008 | 25 Feb 2015 | | | 26th, Floor, Portland House Bressenden Place, London, SW1E 5BG, United Kingdom |