| BORRETT, Nicholas James William ACTIVE | Secretary | 27 Jul 2012 | | | | 33, Wigmore Street, London, W1U 1QX, United Kingdom |
| BEALEY, Matthew Edward ACTIVE | Director | 03 Aug 2023 | | England | August 1980 | 33, Wigmore Street, London, W1U 1QX |
| CAVILL, John Ivor ACTIVE | Director | 19 Feb 2016 | | England | October 1972 | 16, Palace Street, London, SW1E 5JD, United Kingdom |
| KNIGHT, Mark Jonathan ACTIVE | Director | 08 Feb 2023 | | United Kingdom | October 1974 | Infrastructure Managers Ltd, 2nd Floor Drum Suite, Saltire Court, 20 Castle Terrace, Edinburgh, EH1 2EN, United Kingdom |
| CROWTHER, Stephen John RESIGNED | Secretary | 28 Apr 2000 | 10 Jun 2003 | | | 27 Fishery Road, Hemel Hempstead, Hertfordshire, HP1 1NB |
| MISELL, Neal Gregory RESIGNED | Secretary | 10 Jun 2003 | 28 Oct 2008 | | | SS9 |
| NOBLE, Andrew Christopher John RESIGNED | Secretary | 28 Oct 2008 | 30 Jun 2009 | | | 25, Oaken Lane, Claygate, Surrey, KT10 0RG |
| TAYLOR, Richard Hewitt RESIGNED | Secretary | 30 Jun 2009 | 08 Oct 2010 | | | Arnolds Cottage, Eddy Green Road, Lytchett Matravers, Poole, Dorset, BH16 6HL |
| TELLER, Valerie Francine Anne RESIGNED | Secretary | 08 Oct 2010 | 27 Jul 2012 | | | C/O Babcock International Group Plc, 33 Wigmore Street, London, W1U 1QX, United Kingdom |
| ALERT COMMUNICATIONS (HOLDINGS) LIMITED RESIGNED | Secretary | 30 Jun 2009 | 30 Jun 2009 | | | Arnolds Cottage, Eddy Green Road, Lytchett Matravers, Poole, Dorset, BH16 6HL |
| MITRE SECRETARIES LIMITED RESIGNED | Nominee Secretary | 07 Sep 1999 | 28 Apr 2000 | | | Mitre House, 160 Aldersgate Street, London, EC1A 4DD |
| ASHBROOK, Philip Peter RESIGNED | Director | 25 Jul 2014 | 29 Jun 2018 | United Kingdom | May 1960 | Infrastructure Managers Limited,, 2nd Floor, 11 Thistle Street, Edinburgh, Scotland, EH2 1DF, Scotland |
| BARRETT, Stephen Phillip RESIGNED | Director | 01 Jun 2012 | 10 Mar 2015 | England | January 1957 | Babcock Land Limited 1, Enterprise Way, Bournemouth Airport Christchurch, Dorset, England, BH23 6BS, England |
| BRADLEY, Victoria Louise RESIGNED | Director | 26 Feb 2009 | 12 Dec 2011 | United Kingdom | October 1971 | 1, Churchill Place, London, E14 5HP |
| CAWOOD, Kevin Roger RESIGNED | Director | 31 May 2000 | 24 Nov 2004 | United Kingdom | November 1964 | 19 Great Portway, Biddenham, Bedfordshire, MK40 4GA |
| CAWOOD, Kevin Roger RESIGNED | Director | 28 Apr 2000 | 31 May 2000 | United Kingdom | November 1964 | 19 Great Portway, Biddenham, Bedfordshire, MK40 4GA |
| CROWTHER, Stephen John RESIGNED | Director | 28 Apr 2000 | 10 May 2003 | England | March 1956 | 27 Fishery Road, Hemel Hempstead, Hertfordshire, HP1 1NB |
| DRAKE, Richard Daniel, Dr RESIGNED | Director | 28 Sep 2018 | 20 Sep 2022 | United Kingdom | April 1973 | Ashton House, Ashton Vale Road, Bristol, BS3 2HQ, England |
| EDENBOROUGH, James Simon RESIGNED | Director | 23 Sep 2019 | 03 Aug 2023 | United Kingdom | October 1975 | Babcock International Group, Ashton House, Ashton Vale Road, Bristol, BS3 HQ, United Kingdom |
| ELLIOTT, Christopher James RESIGNED | Director | 31 May 2000 | 09 Jan 2003 | | May 1950 | 29 Kippington Road, Sevenoaks, Kent, TN13 2LJ |
| HAGA, Thomas Justin RESIGNED | Director | 12 Dec 2011 | 19 Mar 2014 | United Kingdom | February 1976 | 1, Churchill Place, London, England And Wales, E14 5HP, United Kingdom |
| HOBBS, David Jack RESIGNED | Director | 30 Jun 2009 | 08 Oct 2010 | United Kingdom | June 1952 | 17, Walberton Avenue, East Cosham, Portsmouth, Hampshire, PO6 2JH |
| HOILE, Richard David RESIGNED | Director | 19 Mar 2014 | 25 Jul 2014 | United Kingdom | December 1963 | Infrastructure Managers Limited,, 2nd Floor, 11 Thistle Street, Edinburgh, Scotland, EH2 1DF, Scotland |
| JENNINGS, Oliver James Wake RESIGNED | Director | 09 Jan 2003 | 16 Dec 2005 | | May 1963 | 62 Kings Road, Kingston Upon Thames, Surrey, KT2 5HS |
| JONES, Alan Wingate RESIGNED | Director | 07 Dec 2000 | 22 May 2007 | | October 1939 | The Grange, North Cadbury, Yeovil, Somerset, BA22 7BY |
| JONES, Matthew RESIGNED | Director | 01 Apr 2018 | 06 Sep 2019 | England | August 1983 | Unit 100, Bristol Business Park, Stoke Gifford, Bristol, BS16 1EJ, United Kingdom |
| LEWIS, Jeffrey RESIGNED | Director | 25 Oct 2012 | 28 Sep 2018 | United Kingdom | May 1963 | Ashton House, Ashton Vale Road, Bristol, BS3 2HQ, England |
| MCCLATCHEY, Robert Sean RESIGNED | Director | 31 May 2000 | 16 Dec 2005 | | February 1965 | Flat B 23 Holland Road, West Kensington, London, W14 8HJ |
| MCDONAGH, John RESIGNED | Director | 16 Dec 2005 | 26 Feb 2009 | | May 1969 | 59 Sarsfield Road, London, SW12 8HR |
| MISELL, Neal Gregory RESIGNED | Director | 24 Nov 2004 | 28 Oct 2008 | England | October 1967 | SS9 |
| NAREY, Elizabeth Agnes RESIGNED | Director | 08 Oct 2010 | 19 Feb 2016 | England | October 1964 | C/O Babcock International Group Plc, 33 Wigmore Street, London, W1U 1QX, United Kingdom |
| NICHOLLS, Andrew Charles RESIGNED | Director | 08 Oct 2010 | 25 Oct 2012 | | June 1955 | Rubies, Seven Stars Lane, Tamerton Foliot, Plymouth, PL5 4NN, England |
| NOBLE, Andrew Christopher John RESIGNED | Director | 28 Oct 2008 | 30 Jun 2009 | United Kingdom | December 1961 | 25, Oaken Lane, Claygate, Surrey, KT10 0RG |
| RICH, Michael William RESIGNED | Nominee Director | 07 Sep 1999 | 28 Apr 2000 | | July 1947 | Hillfield, Gorse Hill, Farningham, Kent, DA4 0JU |
| RYAN, Michael Joseph RESIGNED | Director | 16 Dec 2005 | 26 Feb 2009 | United Kingdom | April 1966 | Apartment 42,, Central Building, 3 Matthew Parker Street, London, SW1H 9NE |
| SHELDRAKE, Peter John RESIGNED | Director | 02 Jul 2018 | 08 Feb 2023 | England | April 1959 | 33, Wigmore Street, London, W1U 1QX |
| STEWART, Karen Louise RESIGNED | Director | 19 Feb 2016 | 01 Apr 2018 | United Kingdom | May 1979 | 33, Wigmore Street, London, W1U 1QX, United Kingdom |
| TAYLOR, Matthew David RESIGNED | Director | 20 Sep 2022 | 05 Aug 2026 | United Kingdom | April 1972 | 33, Wigmore Street, London, W1U 1QX, United Kingdom |
| TAYLOR, Richard Hewitt RESIGNED | Director | 30 Jun 2009 | 08 Oct 2010 | United Kingdom | February 1961 | Arnolds Cottage, Eddy Green Road, Lytchett Matravers, Poole, Dorset, BH16 6HL |
| UMBERS, Douglas RESIGNED | Director | 10 Jun 2003 | 30 Jun 2009 | United Kingdom | July 1965 | SO53 |
| WARNER, William RESIGNED | Director | 07 Sep 1999 | 28 Apr 2000 | | July 1968 | 2 Honeysuckle Gardens, Croydon, CR0 8XU |
| ALERT COMMUNICATIONS (HOLDINGS) LIMITED RESIGNED | Director | 30 Jun 2009 | 30 Jun 2009 | | | Arnolds Cottage, Eddy Green Road, Lytchett Matravers, Poole, Dorset, BH16 6HL |
| ALERT COMMUNICATIONS (HOLDINGS) LIMITED RESIGNED | Director | 30 Jun 2009 | 30 Jun 2009 | | | 17, Walberton Avenue, East Cosham, Portsmouth, Hampshire, PO6 2JH |
| BIIF CORPORATE SERVICES LIMITED RESIGNED | Director | 07 Jul 2010 | 19 Feb 2016 | | | Law Debenture, Fifth Floor, 100 Wood Street, London, EC2V 7EX, United Kingdom |