| INFRASTRUCTURE MANAGERS LIMITED ACTIVE | Secretary | 06 Feb 2015 | | | | 8th Floor, 6 Kean Street, London, WC2B 4AS, United Kingdom |
| BOND, Josh Callum ACTIVE | Director | 23 Apr 2024 | | United Kingdom | May 1991 | Infrastructure Managers Limited, 2nd Floor Drum Suite, Saltire Court, 20 Castle Terrace, Edinburgh, EH1 2EN, United Kingdom |
| GORDON, John Stephen ACTIVE | Director | 01 Jul 2016 | | Scotland | December 1962 | Dalmore Capital, Caledonian Exchange, 19a Canning Street, Edinburgh, EH3 8EG, United Kingdom |
| KNIGHT, Mark Jonathan ACTIVE | Director | 19 Jan 2023 | | United Kingdom | October 1974 | 8th Floor, 6 Kean Street, London, WC2B 4AS, United Kingdom |
| MCGHEE, Steven John ACTIVE | Director | 29 Jan 2024 | | United Kingdom | October 1983 | Dalmore Capital, Caledonian Exchange, 19a Canning Street, Edinburgh, EH3 8EG, United Kingdom |
| ANGELL, Jonathan Charles RESIGNED | Secretary | 23 Jan 1998 | 27 Feb 1998 | | | 5 Roes Close, Sawston, Cambridge, Cambridgeshire, CB2 4TH |
| SANDERS, Jan RESIGNED | Secretary | 27 Feb 1998 | 06 Feb 2015 | | | Kingswood, 55 Priests Lane, Brentwood, Essex, CM15 8BX |
| SWIFT INCORPORATIONS LIMITED RESIGNED | Nominee Secretary | 03 Dec 1997 | 23 Jan 1998 | | | 26, Church Street, London, NW8 8EP |
| ACUTT, Bryan Michael RESIGNED | Director | 10 Feb 2016 | 23 Apr 2024 | United Kingdom | October 1979 | 16, Palace Street, London, SW1E 5JD, United Kingdom |
| ANGELL, Jonathan Charles RESIGNED | Director | 23 Jan 1998 | 17 Mar 1998 | | March 1966 | 5 Roes Close, Sawston, Cambridge, Cambridgeshire, CB2 4TH |
| ARCHBOLD, Michael RESIGNED | Director | 03 May 2000 | 27 Apr 2006 | | July 1946 | Copper Beech, 5 Homewood, Cranleigh, Surrey, GU6 7HS |
| BLANCHARD, David Graham RESIGNED | Director | 01 Aug 2013 | 30 Jun 2014 | England | November 1967 | Broadwalk House, 5 Appold Street, London, EC2A 2HA |
| CAMPBELL, Alastair John RESIGNED | Director | 29 Mar 2011 | 01 Aug 2013 | United Kingdom | November 1969 | Broadwalk House, 5 Appold Street, London, EC2A 2HA |
| CARVALHO, Guilherme Pimenta Froes De RESIGNED | Director | 19 Mar 2009 | 22 Feb 2011 | United Kingdom | January 1975 | Barclays Bank Plc, 1 Churchill Place, London, E14 5HP |
| CASHMORE, James RESIGNED | Director | 30 Jul 1999 | 03 May 2000 | | February 1955 | 4 College Farm Close, Oddington, Kidlington, Oxfordshire, OX5 2RL |
| CAVILL, John Ivor RESIGNED | Director | 14 Oct 2009 | 19 Jan 2023 | England | October 1972 | Cannon Place, 78 Cannon Street, London, EC4N 6AF, United Kingdom |
| CHRISTIE, Rory William RESIGNED | Director | 01 Oct 2014 | 31 May 2023 | United Kingdom | October 1958 | 11, Thistle Street, Edinburgh, Scotland, EH2 1DF, Scotland |
| COHEN, James Lionel RESIGNED | Director | 17 Mar 1998 | 03 May 2000 | | February 1942 | 60 Ormonde Terrace, London, NW8 7LR |
| FALERO, Louis Javier RESIGNED | Director | 22 Feb 2011 | 10 Feb 2016 | England | February 1977 | Cannon Place, 78 Cannon Street, London, EC4N 6AF, United Kingdom |
| GORDON, John Stephen RESIGNED | Director | 25 Feb 2010 | 11 Sep 2012 | United Kingdom | December 1962 | 350, Euston Road, Regent's Place, London, NW1 3AX, United Kingdom |
| HALL, Phillip James RESIGNED | Director | 21 Dec 2006 | 15 Apr 2008 | Uk | January 1969 | 45 Crescent West, Hadley Wood, Hertfordshire, EN4 0EQ |
| HOLDEN, Mark Geoffrey David RESIGNED | Director | 16 Feb 2006 | 25 Feb 2010 | England | September 1957 | 7, Eden Park Road, Cheadle Hulme, Cheshire, SK8 6RG |
| LEWIS, David John RESIGNED | Director | 01 Aug 2013 | 22 Jan 2014 | England | June 1967 | Broadwalk House, 5 Appold Street, London, EC2A 2HA |
| MADDICK, Kevin John RESIGNED | Director | 15 May 2000 | 15 Apr 2008 | United Kingdom | May 1964 | 16 Ringford Road, Wandsworth, London, SW18 1RS |
| MIDDLETON, Dougald RESIGNED | Director | 17 Mar 1998 | 07 Apr 1998 | | April 1963 | 34 Newlands Road, Glasgow, G43 2JD |
| MILLAR, Jeremy Westgarth RESIGNED | Director | 18 Dec 2003 | 01 Mar 2005 | United Kingdom | October 1952 | Barberry House, The Row Wellington, Hereford, HR4 8AP |
| PRITCHARD, Jamie RESIGNED | Director | 25 Feb 2010 | 22 Feb 2011 | United Kingdom | April 1971 | 350, Euston Road, London, NW1 3AX, United Kingdom |
| RABIN, Anthony Leon Philip RESIGNED | Director | 17 Mar 1998 | 05 Aug 2002 | | August 1955 | Fourth Floor, 130 Wilton Road, London, SW1V 1LQ |
| RITCHIE, Alan Campbell RESIGNED | Director | 15 Apr 2008 | 14 Oct 2009 | United Kingdom | April 1967 | 57 Kettilstoun Mains, Linlithgow, West Lothian, EH49 6SH |
| RYAN, Michael RESIGNED | Director | 15 Apr 2008 | 19 Mar 2009 | | April 1966 | 10 Peacock House, St. Giles Road, Camberwell, London, SE5 7RG |
| RYLATT, Ian Kenneth RESIGNED | Director | 05 Aug 2002 | 16 Feb 2006 | England | June 1965 | 127 Park Road, London, W4 3EX |
| SANDERS, Jan RESIGNED | Director | 23 Jan 1998 | 17 Mar 1998 | | September 1959 | Danes Cottage, Navestock Side, Brentwood, Essex, CM14 5SE |
| SMITH, Michael William RESIGNED | Director | 02 Jun 1998 | 02 Jul 1999 | | March 1961 | 17 Hippodrome Mews, London, W11 4NN |
| SPENCER, Christopher Loraine RESIGNED | Director | 27 Apr 2006 | 03 Jun 2009 | United Kingdom | April 1955 | 143 Shooters Hill Road, Blackheath, London, SE3 8UQ |
| THOMPSON, Linda Jayne RESIGNED | Director | 11 Sep 2012 | 01 Aug 2013 | United Kingdom | September 1964 | Broadwalk House, 5 Appold Street, London, EC2A 2HA |
| THOMSON, Lisa Marie RESIGNED | Director | 30 Jan 2014 | 30 Jun 2014 | United Kingdom | July 1976 | Broadwalk House, 5 Appold Street, London, EC2A 2HA |
| THORNTON, Jeffrey Michael RESIGNED | Director | 17 Mar 1998 | 21 Dec 2006 | United Kingdom | April 1953 | 108 March Road, Edinburgh, EH4 3SX |
| INSTANT COMPANIES LIMITED RESIGNED | Nominee Director | 03 Dec 1997 | 23 Jan 1998 | | | 1, Mitchell Lane, Bristol, Avon, BS1 6BU |