| ARMITAGE, Robert ACTIVE | Director | 31 Mar 2010 | | England | July 1955 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| BELL, Jonathan Tuke ACTIVE | Director | 01 Apr 2022 | | Germany | November 1950 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| BOOTH, Steven William ACTIVE | Director | 02 Aug 2021 | | United Kingdom | August 1959 | The Laurels, The Green, Sarratt, Hertfordshire, WD3 6BH, United Kingdom |
| BURKE, Rolfe Nicholas Jan ACTIVE | Director | 01 Jan 2021 | | United Kingdom | July 1959 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| GILL, Stephen Paul ACTIVE | Director | 01 Dec 2024 | | United Kingdom | January 1969 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| GILLARD, Julia Lynn ACTIVE | Director | 02 Aug 2021 | | United Kingdom | March 1976 | 120, Moorgate, London, EC2M 6UR, United Kingdom |
| MACKAY, Christine Ann ACTIVE | Director | 01 Dec 2024 | | United Kingdom | July 1964 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| MCCARTHY, Anita Irene ACTIVE | Director | 01 Jul 2003 | | United Kingdom | March 1955 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| ROBINSON, Paul Jeremy, Dr ACTIVE | Director | 02 Aug 2021 | | United Kingdom | April 1960 | Aon, Pinehurst 11, 2 Pinehurst Road, Farnborough Business Park, Farnborough, GU14 7BF, United Kingdom |
| CHADWICK, Katherine RESIGNED | Secretary | 25 Sep 1995 | 05 May 1999 | | | Channings, Lancaster Road, Forton, Preston, Lancashire, PR3 0BL |
| HUNTER, Joan Margaret RESIGNED | Secretary | 05 May 1999 | 01 Apr 2006 | | | 102 Lansdown Hill, Fulwood, Preston, Lancashire, PR2 3UX |
| MCCARTHY, Anita Irene RESIGNED | Secretary | 18 Jan 2008 | 01 Sep 2013 | | | Walton Manor, Walton, Milton Keynes, Buckinghamshire, MK7 7AJ |
| PAGE, Nicola Ann RESIGNED | Secretary | 14 Feb 2008 | 31 Mar 2010 | | | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| TRUEBLOOD, Matthew RESIGNED | Secretary | 01 Apr 2006 | 18 Jan 2008 | | | 69 Glasslyn Road, London, N8 8RJ |
| SISEC LIMITED RESIGNED | Nominee Secretary | | 25 Sep 1995 | | | 21 Holborn Viaduct, London, EC1A 2DY |
| AHMAD, Haseeb RESIGNED | Director | 31 Mar 2010 | 07 Jun 2011 | United Kingdom | March 1976 | 3 Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| ANDERSON, David Millar RESIGNED | Director | 08 Apr 2008 | 08 Apr 2013 | England | November 1940 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| ANDERSON, David Millar, Dr RESIGNED | Director | 26 Jan 1999 | 01 Oct 2003 | | November 1940 | Ash Vale Riverside Road, Kirkfieldbank, Lanark, Lanarkshire, ML11 9JS |
| BEACH, David Ian RESIGNED | Director | 13 Jun 2012 | 09 Jun 2016 | United Kingdom | June 1961 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES, United Kingdom |
| BELL, Margaret RESIGNED | Director | 20 Apr 1998 | 26 Jan 1999 | | February 1945 | 166 Manxman Road, Blackburn, Lancashire, BB2 3EW |
| BJARNEHALL, Anders Olof RESIGNED | Director | 12 Jul 1999 | 21 Oct 2004 | | January 1948 | PO BOX 9300, Nl-6800 Sb Arnhem, The Netherlands, Netherlands |
| BJARNEHALL, Anders Olof RESIGNED | Director | | 24 May 1995 | | January 1942 | Bergfotsvagen 16, Taby S-183 40, Sweden |
| BOATFIELD, Brian John RESIGNED | Director | 21 Oct 1996 | 10 Dec 1998 | | June 1937 | Little Dormer St Ives Road, Houghton, Huntingdon, Cambridgeshire, PE17 2BJ |
| BOLWERK, Alexander Albertus Maria RESIGNED | Director | 28 Oct 2004 | 24 Nov 2006 | | February 1948 | Huygenslaan 21, 7314 Apeldoorn, The Netherlands |
| BURWOOD, Alan Edward RESIGNED | Director | 06 Apr 2000 | 30 Jun 2003 | | | Walton Manor, Walton, Milton Keynes, Buckinghamshire, MK7 7AJ |
| BUTLER, Anthony James RESIGNED | Director | 10 Jul 2014 | 08 Dec 2020 | United Kingdom | September 1962 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES, United Kingdom |
| CHADWICK, Katherine RESIGNED | Director | 05 May 1999 | 31 Mar 2006 | United Kingdom | April 1947 | Channings, Lancaster Road, Forton, Preston, Lancashire, PR3 0BL |
| CLARKSON, Shaune RESIGNED | Director | 16 Jul 2001 | 15 Jun 2007 | | August 1959 | 101 Amethyst Road, Bilton Grange, Hull, HU9 4JG |
| COOPER, Christopher James RESIGNED | Director | 08 Feb 2008 | 27 Jun 2008 | | January 1957 | Organon Laboratories Ltd, Unit 330 Cambridge Science Park, Milton Road Cambridge, Cambridgeshire, CB4 0FL |
| COOPER, Elizabeth RESIGNED | Director | 14 Oct 2013 | 03 Jul 2014 | United Kingdom | May 1981 | Walton Manor, Walton, Milton Keynes, Buckinghamshire, MK7 7AJ, United Kingdom |
| CROWCROFT, Stephen Michael RESIGNED | Director | 01 Dec 2021 | 01 Dec 2024 | England | September 1950 | C/O Aon Briarcliff House, Kingsmead, Farnborough, GU14 7TE, United Kingdom |
| DAWSON, Colin RESIGNED | Director | 26 Jan 1999 | 15 Jan 2001 | | January 1953 | 2 Burns Close, Whickham, Newcastle Upon Tyne, NE16 5JJ |
| EHREN, Stijn Michiel RESIGNED | Director | 14 Oct 2008 | 26 Feb 2010 | Netherlands | April 1968 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| FERGUSON, Stuart RESIGNED | Director | 03 May 2005 | 31 Jan 2006 | | February 1960 | 9 Baldinnie Place, Finglassie, Glenrothes, Fife, KY7 4TL |
| GARDNER, William RESIGNED | Director | 16 Dec 2019 | 02 Aug 2021 | United Kingdom | November 1964 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES |
| GIBSON, Samuel George, Dr RESIGNED | Director | 14 Oct 2013 | 01 Apr 2022 | United Kingdom | March 1946 | Aon, Briarcliff House, Kingsmead, Farnborough, GU14 7TE, United Kingdom |
| GREEN, Andrew RESIGNED | Director | 01 May 2006 | 19 Nov 2008 | | May 1964 | Walton Manor, Walton, Milton Keynes, Buckinghamshire, MK7 7AJ |
| GREEN, David RESIGNED | Director | 01 Jan 2017 | 02 Aug 2021 | United Kingdom | October 1967 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES |
| HANDS, Robert Edwin RESIGNED | Director | 15 Jan 2001 | 31 Dec 2004 | | March 1946 | 8 Lowside Avenue, Bolton, Lancashire, BL1 5XQ |
| HARWOOD, Keith Anthony Reginald RESIGNED | Director | | 21 Oct 1996 | | July 1949 | 8 Crown Gardens, Edgworth, Bolton, Lancashire, BL7 0QZ |
| HELPS, John Michael RESIGNED | Director | 01 Jan 2017 | 02 Aug 2021 | United Kingdom | January 1967 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES |
| HILLS, David Malcolm RESIGNED | Director | | 30 Apr 2000 | | February 1947 | 2 Lamphey Close Off Victoria Road, Heaton, Bolton, Lancashire, BL1 5AU |
| HORSFORD, Michael Stewart RESIGNED | Director | 26 Jan 1999 | 16 Nov 2000 | | June 1947 | Hawksclough Farm Cottage, Mytholmroyd, Hebden Bridge, West Yorkshire, HX7 5AW |
| HUNT, Michael Ralph RESIGNED | Director | 21 Oct 1996 | 05 May 1999 | | January 1939 | 7 St Catherines Park, Guildford, Surrey, GU1 3NF |
| HUNTER, Joan Margaret RESIGNED | Director | 01 Apr 2006 | 21 Dec 2007 | | August 1961 | 102 Lansdown Hill, Fulwood, Preston, Lancashire, PR2 3UX |
| KIFFEN, Aleidus Albertus RESIGNED | Director | 10 Dec 1998 | 09 Jul 1999 | | December 1949 | Jansbuitensingei 30, PO BOX 2018 Arnhem, FOREIGN, The Netherlands |
| KIFFEN, Aleidus Albertus RESIGNED | Director | 28 Feb 1995 | 17 Oct 1996 | | December 1949 | Eldrikseweg 1, Angelo 6986br, Netherlands |
| KITSON, Philip John RESIGNED | Director | 09 Oct 2003 | 15 Mar 2005 | | March 1952 | Townhead Of Auchencairn, Kirkmahoe, Dumfries, DG1 1RE, Scotland |
| MARSHALL, Ian Leonard RESIGNED | Director | | 04 Jul 1995 | | September 1945 | 12 Wrensfield, Hemel Hempstead, Hertfordshire, HP1 1RN |
| MCGARRY, Lawrence RESIGNED | Director | 13 Jun 2012 | 30 Nov 2021 | United Kingdom | February 1952 | Aon, Briarcliff House, Kingsmead, Farnborough, GU14 7TE, United Kingdom |
| MCGARRY, Lawrence RESIGNED | Director | 08 Apr 2008 | 21 Feb 2012 | United Kingdom | February 1952 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| MILLER, Aire RESIGNED | Director | 17 Dec 2018 | 08 Dec 2020 | United Kingdom | December 1980 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES |
| MULHOLLAND, Eric Carl RESIGNED | Director | 01 Jan 2005 | 21 Dec 2007 | | March 1963 | 18 Glencourse Drive, Preston, Lancashire, PR2 6AF |
| OLSSON, John-Erik Olof RESIGNED | Director | | 14 Jan 1993 | | March 1940 | Lovisedalsvagen 94, S-138 00 Alta, Sweden |
| PHIPPS, James William RESIGNED | Director | 02 Aug 2021 | 31 Mar 2022 | United Kingdom | September 1979 | 120, Moorgate, London, EC2M 6UR, United Kingdom |
| PONTY, Christian RESIGNED | Director | 10 Jun 2011 | 29 Jun 2018 | United Kingdom | May 1968 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES, United Kingdom |
| PROMO, Joseph Brian RESIGNED | Director | 31 Oct 2008 | 26 Feb 2010 | | March 1969 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| READ, James RESIGNED | Director | 01 Oct 2022 | 14 Jul 2023 | United Kingdom | November 1970 | Aon, Briarcliff House, Kingsmead, Farnborough, GU14 7TE, United Kingdom |
| REDHEAD, Keith, Dr RESIGNED | Director | 14 Jan 2009 | 07 Feb 2014 | United Kingdom | March 1953 | 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| REDMOND, Michael Joseph RESIGNED | Director | 20 Apr 1998 | 26 Jan 1999 | | November 1954 | 11 Kings Croft, Ossett, Yorkshire, WF5 8YZ |
| RICHARDSON, Kevin John RESIGNED | Director | 10 Jun 2011 | 22 May 2016 | United Kingdom | February 1962 | Eversheds House, 70 Great Bridgewater Street, Manchester, M1 5ES, United Kingdom |
| ROTHWELL, Garry Anthony RESIGNED | Director | 27 Apr 2004 | 21 Dec 2007 | | April 1953 | 1 Calder Avenue, Darwen, Lancashire, BB3 0JD |
| ROUGHNEEN, Martin Louis RESIGNED | Director | 21 Mar 2003 | 05 Apr 2007 | | August 1957 | 30 Ferryhill Road, Irlam, Manchester, Lancashire, M44 6DD |
| STUART, Angela RESIGNED | Director | 08 Feb 2008 | 31 May 2011 | United Kingdom | May 1962 | Unit 330, Cambridge Science Park, Milton Road, Cambridge, CB4 0FL |
| SWEENEY, Vincent RESIGNED | Director | 08 Feb 2008 | 26 Jun 2008 | | January 1950 | Unit 3, Falcon Way, Welwyn Garden City, Hertfordshire, AL7 1TW |
| TOMBS, Derek Michael RESIGNED | Director | 10 Dec 1998 | 31 Mar 2000 | | April 1940 | 61 Eversden Road, Harlton, Cambridge, Cambridgeshire, CB3 7ET |
| UPTON, John David RESIGNED | Director | 26 Jan 1999 | 21 Mar 2003 | | August 1961 | 19 Earsndale Avenue, Darwen, Lancashire, BB3 1JU |
| WAITE, Ian John RESIGNED | Director | 26 Jan 1999 | 31 Dec 2003 | | January 1947 | 2 Crediton Close, Livesey, Blackburn, BB2 4NP |
| WALTON, Garry RESIGNED | Director | 28 Feb 2005 | 05 Apr 2007 | | March 1963 | 67 Belmont Avenue, Sandbach, Cheshire, CW11 1BT |
| YOUNG, David Paul RESIGNED | Director | 01 May 2000 | 01 Jan 2005 | | September 1951 | Yew Tree House South End, Seaton Ross, York, Yorkshire, YO4 4LZ |