| HARVEY, Sarah ACTIVE | Secretary | 11 May 2026 | | | | Oxford Instruments, Halifax Road, High Wycombe, HP12 3SE, United Kingdom |
| HUTCHINGS, Beverley Jane ACTIVE | Director | 15 Jul 2020 | | United Kingdom | October 1966 | Oxford Instruments, Halifax Road, High Wycombe, HP12 3SE, United Kingdom |
| LANG, Christian ACTIVE | Director | 01 Apr 2025 | | England | January 1977 | Oxford Instruments, Halifax Road, High Wycombe, HP12 3SE, United Kingdom |
| BRIZELL, Katy RESIGNED | Secretary | 05 Apr 2025 | 30 Apr 2025 | | | Tubney Woods, Abingdon, Oxon, OX13 5QX, England |
| GORHAM, Della Louise RESIGNED | Secretary | 20 Dec 1991 | 22 Aug 2005 | | | Oriel Cottage, Littleworth, Faringdon, Oxfordshire, SN7 8EF |
| HAMILTON, Deborah Jane RESIGNED | Secretary | | 20 Dec 1991 | | | 30 Great Clarendon Street, Oxford, Oxfordshire, OX2 6AT |
| HARVEY, Sarah RESIGNED | Secretary | 01 Aug 2021 | 04 Apr 2025 | | | Tubney Woods, Abingdon, Oxon, OX13 5QX, England |
| JOHNSON-BRETT, Susan Karen RESIGNED | Secretary | 15 Jan 2007 | 01 Aug 2021 | | | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| MEADS, Louise RESIGNED | Secretary | 01 May 2025 | 10 May 2026 | | | Oxford Instruments, Halifax Road, High Wycombe, HP12 3SE, United Kingdom |
| YOUNG, Joanne Louise RESIGNED | Secretary | 22 Aug 2005 | 15 Jan 2007 | | | Orchard View, Keyser Road, Bodicote, Banbury, Oxon, OX15 4AN |
| BAILEY, Jay Martin RESIGNED | Director | | 31 Dec 1993 | | January 1939 | 15 Coppins Close, Berkhamsted, Hertfordshire, HP4 3NZ |
| BARKSHIRE, Ian Richard, Dr RESIGNED | Director | 17 Sep 2008 | 04 Jan 2011 | England | November 1965 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| BENNETT, Simon David, Dr RESIGNED | Director | 01 Apr 2000 | 29 Sep 2000 | United Kingdom | September 1952 | Manor Farm House, Main Street, Westbury, Brackley, Northamptonshire, NN13 5JR |
| BOYD, Kevin James RESIGNED | Director | 01 Feb 2007 | 08 Apr 2016 | England | September 1964 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| BROOKS, Dawn Frances RESIGNED | Director | 01 Dec 2015 | 15 May 2017 | United Kingdom | March 1960 | Tubney Woods, Abingdon, Oxon., OX13 5QX, England |
| CLARKE, Richard John George RESIGNED | Director | 01 Mar 2012 | 30 Apr 2014 | England | April 1955 | Tubney Woods, Abingdon, Oxon., OX13 5QX, England |
| COMFORT, John RESIGNED | Director | 01 May 1995 | 28 Mar 2001 | | September 1953 | 7 Pound Close, Kirtlington, Oxfordshire, OX5 3JR |
| CURTIS, Thomas RESIGNED | Director | 01 Jul 2015 | 30 Apr 2018 | England | March 1970 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| CURTIS, Thomas RESIGNED | Director | 04 Jan 2011 | 24 Jul 2012 | England | March 1970 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| DAVIES, Andrew Peter RESIGNED | Director | 04 Jun 2001 | 30 Nov 2009 | England | March 1967 | 1 Beech Close, Wootton, Abingdon, Oxfordshire, OX13 6DG |
| ELLIS, Andrew Timothy, Dr RESIGNED | Director | 09 Nov 2000 | 24 Jun 2009 | | March 1954 | 8, Burgess Close, Abingdon, Oxon, OX14 3JT, United Kingdom |
| FLINT, David Jonathan RESIGNED | Director | 16 May 2005 | 09 May 2014 | England | February 1961 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| HAWORTH, Russell David RESIGNED | Director | | 30 Apr 1993 | | April 1955 | 26 Woodward Close, Winnersh Farm, Wokingham, Berkshire, RG11 5NW |
| HEARN, John Robert RESIGNED | Director | 17 Jul 1992 | 30 Sep 1999 | | August 1935 | 14221 Miranda, Los Altos Hills 94022, Usa, FOREIGN |
| HIGGONS, Robin Ian RESIGNED | Director | | 31 Mar 1998 | | October 1951 | Ivydale House, Belvoir Road, Bottesford, Nottingham, NG13 0BG |
| HILL, Gavin Fenton RESIGNED | Director | 09 May 2016 | 31 Mar 2025 | England | February 1968 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| HOLDEN, Simon David RESIGNED | Director | 30 Apr 2018 | 15 Jul 2020 | United Kingdom | August 1962 | Tubney Woods, Abingdon, Oxon, OX13 5QX, England |
| HOLROYD, Charles John Arthur RESIGNED | Director | 15 May 2017 | 30 Apr 2018 | England | January 1956 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| HOLROYD, Charles John Arthur RESIGNED | Director | 08 Nov 1999 | 09 May 2014 | England | January 1956 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| HUTCHINGS, Beverley Jane RESIGNED | Director | 24 Jun 2009 | 04 Jan 2011 | United Kingdom | October 1966 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| JEFFERSON, James RESIGNED | Director | 04 Jan 2011 | 01 May 2011 | England | April 1960 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| JEFFERSON, James RESIGNED | Director | 01 Feb 2003 | 20 Apr 2009 | England | April 1960 | 7, Glade View, High Wycombe, Bucks, HP12 4UN |
| JONES, Ronald Anthony RESIGNED | Director | | 31 Mar 2000 | | May 1944 | 1 Daws Lea, High Wycombe, Buckinghamshire, HP11 1QG |
| LEWIS-CROSBY, John Cornwall RESIGNED | Director | | 01 May 1995 | | January 1948 | West Side Foxcombe Lane, Boars Hill, Oxford, Oxfordshire, OX1 5DH |
| LOWE, Barrie Glyn RESIGNED | Director | | 31 Mar 2000 | | January 1940 | Church Cottage Church Lane, Charlton On Otmoor, Kidlington, Oxfordshire, OX5 2UA |
| MACKINTOSH, Andrew John, Dr RESIGNED | Director | 06 Apr 1998 | 10 Jan 2005 | England | September 1955 | 11 Islip Road, Oxford, Oxfordshire, OX2 7SN |
| MITCHELL, Brian Robert RESIGNED | Director | 01 Apr 2000 | 31 Jul 2001 | United Kingdom | May 1949 | 2 Hawthorn Crescent, Grove, Wantage, Oxfordshire, OX12 7JB |
| PIKE, Robert Alexander RESIGNED | Director | 09 May 2014 | 29 Jun 2015 | United Kingdom | June 1980 | Tubney Woods, Abingdon, Oxon, OX13 5QX |
| ROBERTS, Peter Edwin Joseph RESIGNED | Director | 12 Jul 1993 | 28 Jun 1999 | England | November 1951 | 98 Pinkneys Road, Maidenhead, Berkshire, SL6 5DN |
| SAREEN, Robert Anthony, Doctor RESIGNED | Director | | 30 Sep 1992 | | January 1941 | Quarry Wood House, Quarrywood, Marlow, Buckinghamshire, SL7 1RF |
| SCOTT, David Mckenny RESIGNED | Director | 29 Jun 1998 | 01 Dec 2015 | | June 1952 | Tubney Woods, Abingdon, Oxon., OX13 5QX, England |
| STATHAM, Peter John RESIGNED | Director | | 31 Mar 2000 | | July 1951 | Withurst Church Road, Lane End, High Wycombe, Buckinghamshire, HP14 3HL |
| STEWARD, James Edward RESIGNED | Director | 13 Feb 1992 | 01 Apr 1998 | | June 1944 | 11 Gossmore Walk, Marlow, Buckinghamshire, SL7 1QZ |
| TURNER, Jonathan Paul RESIGNED | Director | 30 Apr 2018 | 15 Jul 2020 | United Kingdom | October 1978 | Tubney Woods, Abingdon, Oxon, OX13 5QX, England |
| VARNAM, Daniel Arthur RESIGNED | Director | 02 Nov 1998 | 21 Jul 2009 | | May 1958 | 28 Ferndale Close, Stokenchurch, Bucks, HP14 3NT |
| WEBB, Stephen RESIGNED | Director | 10 Sep 2001 | 01 Feb 2003 | | April 1960 | 8 Newland Street, Witham, Essex, CM8 2AQ |
| WEIDENBAUM, Daniel RESIGNED | Director | | 01 Nov 1993 | England | September 1955 | Barnside Hedsor Road, Bourne End, Buckinghamshire, SL8 5EE |
| WILCOCK, Ian Christopher, Dr RESIGNED | Director | 15 Jul 2020 | 31 May 2024 | England | February 1967 | Tubney Woods, Abingdon, Oxon, OX13 5QX, England |