| PAULL, Andrew ACTIVE | Secretary | 30 Nov 2018 | | | | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| DICK, Graham ACTIVE | Director | 09 Mar 2015 | | United Kingdom | March 1951 | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| PAULL, Andrew Denis ACTIVE | Director | 30 Nov 2018 | | England | November 1974 | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| TONNER, Dominic Stephen ACTIVE | Director | 27 Feb 2015 | | England | September 1957 | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| UPPAL, Rajan ACTIVE | Director | 27 Feb 2015 | | England | November 1962 | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| WOOD, Neil Timothy ACTIVE | Director | 03 Sep 2018 | | England | February 1965 | The Quorum, Bond Street South, Bristol, BS1 3AE, England |
| BLISS, Edward Robert Clegg, Dr RESIGNED | Secretary | 21 May 2010 | 24 Sep 2012 | | | 4th Floor, 44-46 Whitfield Street, London, W1T 2RJ, United Kingdom |
| EVANS, William Edward Frank RESIGNED | Secretary | 03 Jun 2017 | 30 Nov 2018 | | | New Bond House, Bond Street, Bristol, BS2 9AG |
| PLUMMER, Nicholas Roger Clive RESIGNED | Secretary | 19 Apr 2004 | 28 Mar 2008 | | | 79 New Cavendish Street, London, W1W 6XB |
| STEVEN, Susan Margaret RESIGNED | Secretary | 24 Sep 2012 | 02 Jun 2017 | | | New Bond House, Bond Street, Bristol, BS2 9AG, England |
| WILLIAMS, Martyn Douglas RESIGNED | Secretary | 28 Mar 2008 | 21 May 2010 | | | 79 New Cavendish Street, London, W1W 6XB |
| WILLIAMS, Martyn Douglas RESIGNED | Secretary | 29 Jan 2002 | 19 Apr 2004 | | | 1 Fitzroy Mews, London, W1T 6DE |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 31 Oct 2001 | 29 Jan 2002 | | | 26, Church Street, London, NW8 8EP |
| BLOXHAM, David Philip, Dr RESIGNED | Director | 01 Mar 2011 | 27 Feb 2015 | United Kingdom | May 1947 | 11, Staple Inn, London, WC1V 7QH, England |
| CARTER, Bruce, Dr RESIGNED | Director | 07 Jul 2005 | 24 Apr 2008 | | June 1943 | 79 New Cavendish Street, London, W1W 6XB |
| CHRISTIE, Andrew Hildred RESIGNED | Director | 24 Apr 2008 | 09 Mar 2011 | England | March 1956 | 79, New Cavendish Street, London, W1W 6XB |
| EVANS, William Edward Frank RESIGNED | Director | 19 Sep 2016 | 30 Nov 2018 | England | March 1974 | New Bond House, Bond Street, Bristol, BS2 9AG |
| KEEN, Peter Stephen RESIGNED | Director | 24 Apr 2002 | 17 May 2012 | United Kingdom | August 1957 | 4th Floor, 44-46 Whitfield Street, London, W1T 2RJ, United Kingdom |
| KURKIJARVI, Kalevi, Dr RESIGNED | Director | 24 Apr 2002 | 03 Mar 2004 | | March 1952 | 1 Fitzroy Mews, London, W1T 6DE |
| MARTIN, John Francis, Professor RESIGNED | Director | 24 Apr 2002 | 03 Mar 2004 | | July 1943 | 1 Fitzroy Mews, London, W1T 6DE |
| PARKER, Nigel Richard RESIGNED | Director | 29 Jan 2002 | 05 May 2010 | United Kingdom | August 1953 | 79 New Cavendish Street, London, W1W 6XB |
| PLISCHKE, Wolfgang RESIGNED | Director | 09 Nov 2003 | 17 Aug 2010 | | September 1951 | 79 New Cavendish Street, London, W1W 6XB |
| PRINCE, David Norman RESIGNED | Director | 26 May 2004 | 15 Mar 2013 | United Kingdom | June 1951 | The Barn Heron's Ghyll, Tilford Road, Tilford, Farnham, Surrey, GU10 2DD, United Kingdom |
| RICHMOND, Mark Henry RESIGNED | Director | 24 Apr 2002 | 17 Aug 2010 | | February 1931 | 79 New Cavendish Street, London, W1W 6XB |
| ROSS, Iain Gladstone RESIGNED | Director | 09 Sep 2010 | 16 Oct 2017 | England | January 1954 | New Bond House, Bond Street, Bristol, BS2 9AG, England |
| SMITH, Daniel Francis RESIGNED | Director | 27 Feb 2015 | 16 Sep 2016 | England | January 1981 | New Bond House, Bond Street, Bristol, BS2 9AG, England |
| SPICER, Charles Alexander Evan, Dr RESIGNED | Director | 12 Mar 2012 | 30 Jun 2014 | England | January 1965 | 85, Tottenham Court Road, London, W1T 4TQ, United Kingdom |
| STEVEN, Susan Margaret RESIGNED | Director | 30 Jun 2014 | 27 Feb 2015 | England | April 1962 | 11, Staple Inn, London, WC1V 7QH, England |
| THOMPSON, Juliet RESIGNED | Director | 25 Apr 2016 | 01 Mar 2018 | England | May 1966 | New Bond House, Bond Street, Bristol, BS2 9AG |
| TURNER, Dennis Michael John RESIGNED | Director | 24 Apr 2002 | 30 Jun 2009 | | October 1942 | 79 New Cavendish Street, London, W1W 6XB |
| VENABLES, David Charles, Dr RESIGNED | Director | 16 Apr 2012 | 27 Feb 2015 | Scotland | December 1966 | 11, Staple Inn, London, WC1V 7QH, England |
| VERNON, Geoffrey RESIGNED | Director | 24 Apr 2002 | 16 Jul 2003 | | March 1952 | 1 Fitzroy Mews, London, W1T 6DE |
| WILLIAMS, Martyn Douglas RESIGNED | Director | 29 Jan 2002 | 31 Jul 2012 | United Kingdom | May 1951 | 4th Floor, 44-46 Whitfield Street, London, W1T 2RJ, United Kingdom |
| YLA HERTTUALA, Seppo, Professor RESIGNED | Director | 24 Apr 2002 | 15 Mar 2013 | Finland | January 1957 | The Barn Heron's Ghyll, Tilford Road, Tilford, Farnham, Surrey, GU10 2DD, United Kingdom |
| INSTANT COMPANIES LIMITED RESIGNED | Nominee Director | 31 Oct 2001 | 29 Jan 2002 | | | 1, Mitchell Lane, Bristol, Avon, BS1 6BU |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Director | 31 Oct 2001 | 29 Jan 2002 | | | 26, Church Street, London, NW8 8EP |