| BARROW JR, Martin Lee ACTIVE | Director | 29 Jun 2023 | | United States | August 1973 | Prudential Tower, 800 Boylston Street, Boston, Ma 02199-8069, United States |
| LECCESE JR, Frank Paul ACTIVE | Director | 10 Apr 2026 | | United States | February 1969 | Scott House,, Suite 1 The Concourse, Waterloo Station, London, SE1 7LY, England |
| BLOGH, Julian, Doctor RESIGNED | Secretary | 16 Sep 1993 | 12 Oct 1993 | | | Blackthorns, Dukes Lane, Gerrards Cross, Buckinghamshire, SL9 7JZ |
| GARBETT-EDWARDS, David RESIGNED | Secretary | 24 Apr 2009 | 27 Apr 2012 | | | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| HARRIS, Sharon RESIGNED | Secretary | 27 Apr 2012 | 02 Jan 2018 | | | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| JEFFCOAT, David John RESIGNED | Secretary | 24 Jul 2000 | 24 Apr 2009 | | | 417 Bridport Road, Greenford, Middlesex, UB6 8UA |
| KIRK, Graham Henry RESIGNED | Secretary | 09 Dec 2022 | 26 Apr 2023 | | | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| PRAKASH, Anant RESIGNED | Secretary | 03 Jan 2018 | 28 Jan 2019 | | | Ultra Electronics, 419, Bridport Road, London, UB6 8UA, United Kingdom |
| RUPPEL, Brenda Louise RESIGNED | Secretary | 28 Jan 2019 | 09 Dec 2022 | | | 35, Portman Square, London, W1H 6LR, United Kingdom |
| YEOMAN, Ian Christopher RESIGNED | Secretary | 11 Oct 1993 | 24 Jul 2000 | | | Briarfield Harewood Road, Chalfont St Giles, Buckinghamshire, HP8 4UB |
| YEOMAN, Ian Christopher RESIGNED | Secretary | 23 Aug 1993 | 16 Sep 1993 | | | Briarfield Harewood Road, Chalfont St Giles, Buckinghamshire, HP8 4UB |
| OVALSEC LIMITED RESIGNED | Nominee Secretary | 25 Jun 1993 | 23 Aug 1993 | | | 2 Temple Back East, Temple Quay, Bristol, BS1 6EG |
| ANDERSON, Mark, Rear Admiral RESIGNED | Director | 01 Apr 2012 | 01 Jun 2017 | England | June 1956 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| BAILEY, Christopher Stuart RESIGNED | Director | 28 Jan 2005 | 30 Apr 2015 | England | March 1946 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| BLOGH, Julian, Doctor RESIGNED | Director | 23 Aug 1993 | 21 Apr 2011 | United Kingdom | December 1943 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| BOMBA, Karen RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | United States | October 1964 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| BROADHURST, Martin Tilston RESIGNED | Director | 02 Jul 2012 | 01 Jul 2021 | United Kingdom | August 1953 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| CASTER, Douglas RESIGNED | Director | 09 Oct 1993 | 28 Jan 2019 | United Kingdom | May 1953 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| CLEMENTS, Martin Hugh RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | England | July 1961 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| DEAN, Paul David RESIGNED | Director | 24 Apr 2009 | 31 Mar 2013 | England | January 1961 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| GOPALAN, Geeta RESIGNED | Director | 28 Apr 2017 | 01 Aug 2022 | England | July 1964 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| GRIFFITHS, Ian Roy RESIGNED | Director | 17 Apr 2003 | 02 Jul 2012 | England | October 1950 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| HAMMENT, Andrew Norman RESIGNED | Director | 17 Aug 2000 | 30 Mar 2012 | United Kingdom | September 1954 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| HART, Timothy Guy Collins RESIGNED | Director | 09 Oct 1993 | 24 Apr 1998 | United Kingdom | August 1953 | Kingswood House, The Lee, Great Missenden, Buckinghamshire, HP16 9NU |
| HINE, Nicholas William RESIGNED | Director | 18 Aug 2022 | 26 Apr 2023 | United Kingdom | February 1966 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| HIRST, John Raymond RESIGNED | Director | 01 Jan 2015 | 01 Sep 2019 | United Kingdom | August 1952 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA, England |
| HITT, Bob RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | United States | June 1957 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| HOLROYD, Frank Martyn, Sir RESIGNED | Director | 01 Mar 1995 | 28 Jul 2003 | England | August 1935 | Barrow House, Ford Lane, Pilton, Somerset, BA4 4BT |
| HOPE, Frank, Dr RESIGNED | Director | 01 Jan 1999 | 31 Jul 2008 | United Kingdom | October 1954 | 5, Ashley Hill Place, Cockpole Green, Wargrave, Berkshire, RG10 8NL, United Kingdom |
| HULL, Victoria Mary RESIGNED | Director | 28 Apr 2017 | 01 Aug 2022 | United Kingdom | March 1962 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| HUNZEKER, Kenneth William RESIGNED | Director | 01 Jul 2020 | 01 Aug 2022 | United States | August 1952 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| JEFFCOAT, David John RESIGNED | Director | 24 Jul 2000 | 24 Apr 2009 | | April 1950 | 417 Bridport Road, Greenford, Middlesex, UB6 8UA |
| LANE, Richard George RESIGNED | Director | 09 Oct 1993 | 17 Aug 2000 | | May 1942 | Dorner House, Charingworth Court Winchcombe, Cheltenham, Gloucestershire, GL54 5JS |
| MACFARLANE, Peter Froude RESIGNED | Director | 21 Dec 1994 | 22 Apr 2005 | | July 1938 | Barn Cottage, Brook Road Sandhills, Godalming, Surrey, GU8 5UR |
| MALANI, Shonnel RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | England | December 1979 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| MARSHALL, Michael Robert Christopher RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | England | February 1982 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| PRYCE, Simon Charles Conrad RESIGNED | Director | 18 Jun 2018 | 31 Dec 2022 | United Kingdom | December 1961 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| RICE, William Anthony RESIGNED | Director | 18 Dec 2018 | 01 Aug 2022 | United Kingdom | March 1952 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| RISTAINO, Michael Joseph RESIGNED | Director | 26 Apr 2023 | 29 Jun 2023 | United States | October 1961 | Prudential Tower, 800 Boylston Street, Boston, United States |
| ROUTILA, Panu RESIGNED | Director | 18 Aug 2022 | 26 Apr 2023 | Finland | June 1964 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| SCHULZ, Eric RESIGNED | Director | 01 Aug 2022 | 26 Apr 2023 | France | January 1963 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| SCLATER, Mark Josceline RESIGNED | Director | 09 Dec 2019 | 31 Dec 2022 | United Kingdom | November 1972 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| SHARMA, Amitabh RESIGNED | Director | 04 May 2016 | 01 Dec 2019 | England | January 1967 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| SHARMA, Rakesh RESIGNED | Director | 23 Apr 2010 | 10 Nov 2017 | England | June 1961 | 417, Bridport Road, Greenford, Middlesex, UB6 8UA |
| SHOOK, Daniel James RESIGNED | Director | 01 Sep 2019 | 01 Aug 2022 | United Kingdom | May 1967 | 35, Portman Square, Marylebone, London, W1H 6LR, United Kingdom |
| SIMAO, Claudio RESIGNED | Director | 18 Aug 2022 | 26 Apr 2023 | England | June 1957 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| TAYLOR, John RESIGNED | Director | 23 Aug 1993 | 28 Feb 1999 | | April 1946 | Reynolds House, Standford Lane Headley, Bordon, Hampshire, GU35 8RQ |
| THOMAS, David Myrddin RESIGNED | Director | 09 Oct 1993 | 11 Sep 1996 | | July 1943 | Shermanbury, Meadow Lane, Hartley Wintney, Hampshire, RG27 8RF |
| WALDNER, Mary Elizabeth RESIGNED | Director | 01 Jul 2013 | 16 Mar 2016 | United Kingdom | October 1969 | 417 Bridport Road, Greenford, Middlesex, UB6 8UA |
| WALKER, Andrew John RESIGNED | Director | 01 Jun 1996 | 24 Apr 2009 | United Kingdom | September 1951 | The Browns End, Bromesberrow, Gloucestershire, HR8 1RX |
| WALMSLEY, Robert, Sir RESIGNED | Director | 22 Jan 2009 | 13 May 2020 | England | February 1941 | 35, Portman Square, London, W1H 6LR, United Kingdom |
| WEBB, Richard David Robert RESIGNED | Director | 09 Dec 2022 | 26 Apr 2023 | United Kingdom | November 1976 | Unit C1 Knaves Beech Business Centre, Davies Way, Loudwater, Wooburn Green, High Wycombe, HP10 9UT, United Kingdom |
| WHITT JR., Donald Edward RESIGNED | Director | 26 Apr 2023 | 10 Apr 2026 | United States | October 1966 | Prudential Tower, 800 Boylston Street, Boston, United States |
| YEOMAN, Ian Christopher RESIGNED | Director | 11 Oct 1993 | 24 Jul 2000 | England | January 1955 | Briarfield Harewood Road, Chalfont St Giles, Buckinghamshire, HP8 4UB |
| OVAL NOMINEES LIMITED RESIGNED | Nominee Director | 25 Jun 1993 | 23 Aug 1993 | | | 2 Temple Back East, Temple Quay, Bristol, BS1 6EG |
| OVALSEC LIMITED RESIGNED | Nominee Director | 25 Jun 1993 | 23 Aug 1993 | | | 2 Temple Back East, Temple Quay, Bristol, BS1 6EG |