| KYTE, Christopher James ACTIVE | Director | 12 May 2022 | | United Kingdom | May 1982 | C/O Checkit Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, England |
| SHAW, Kristian Stuart ACTIVE | Director | 14 Oct 2024 | | England | March 1978 | 93, Fleet Road, Fleet, GU51 3PJ, England |
| ANDERSON, Brian Anthony RESIGNED | Secretary | 07 Mar 2002 | 27 Sep 2004 | | | South Barn, Church Farm, Chartway Street, East Sutton, Kent, ME17 3JB |
| ANDREWS, Jill RESIGNED | Secretary | 09 Dec 1993 | 01 Apr 1997 | | | 69 Park Close, Dagmar Road, Kingston Upon Thames, Surrey, KT2 6DW |
| CULSHAW, Alasdair Douglas RESIGNED | Secretary | 27 Sep 2004 | 08 Mar 2006 | | | 20 Old Malt Way, Horsell, Woking, Surrey, GU21 4QD |
| DOW, Nicoll Lany RESIGNED | Secretary | 10 Dec 2001 | 07 Mar 2002 | | | 275 King Henrys Drive, Croydon, CR0 0AE |
| DYER BARTLETT, Dudley Richard Max RESIGNED | Secretary | 08 Mar 2006 | 01 Aug 2006 | | | Ketton House, Rectory Road, Kedington, Suffolk, CB9 7QL |
| PITFIELD, Jacqueline Molloy RESIGNED | Secretary | 01 Apr 1997 | 10 Dec 2001 | | | Tapestry Court, Mortlake High Street, London, SW14 8HJ |
| PORTER, Robert Charles RESIGNED | Secretary | 01 Aug 2006 | 20 Mar 2009 | | | 29 Bracken Gardens, Barnes, London, SW13 9HW |
| REEVES, Martin Leslie RESIGNED | Secretary | 01 Sep 2010 | 29 Sep 2016 | | | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, United Kingdom |
| ROUTS, Stanley Alan Frederick RESIGNED | Secretary | | 09 Dec 1993 | | | 15 Cedars Road, Hampton Wick, Kingston, KT1 4BG |
| SPINK, Geoffrey RESIGNED | Secretary | 20 Mar 2009 | 01 Sep 2010 | | | 5 Lakeside Business Park, Swan Lane, Sandhurst, Berkshire, GU47 9DN |
| WEATHERSTONE, Andrew Paul RESIGNED | Secretary | 29 Sep 2016 | 21 Aug 2020 | | | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, United Kingdom |
| ANDERSON, Raymond Quintus RESIGNED | Director | | 09 Dec 1993 | | November 1930 | 111 West Second Street, Jamestown, New York, FOREIGN, Usa |
| COOPER, Anthony William RESIGNED | Director | 31 Aug 2011 | 12 Oct 2012 | England | September 1976 | Moordene South Milton, Kingsbridge, Devon, TQ7 3JW, England |
| CULSHAW, Alasdair Douglas RESIGNED | Director | 27 Sep 2004 | 08 Mar 2006 | | June 1952 | 20 Old Malt Way, Horsell, Woking, Surrey, GU21 4QD |
| DALEY, Keith Anthony RESIGNED | Director | 12 Oct 2012 | 31 Jan 2019 | England | May 1955 | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA |
| DYER BARTLETT, Dudley Richard Max RESIGNED | Director | 14 Dec 1999 | 20 Mar 2009 | England | March 1957 | Ketton House, Rectory Road, Kedington, Suffolk, CB9 7QL |
| GURNEY, Grahame RESIGNED | Director | 11 Dec 2007 | 31 Dec 2011 | United Kingdom | June 1960 | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, United Kingdom |
| LEEMING, David Roger RESIGNED | Director | 10 Nov 2001 | 31 Dec 2007 | England | August 1947 | 113 Calabria Road, London, N5 1HS |
| MUIR, Aylsa Kim RESIGNED | Director | 24 Sep 2020 | 03 Sep 2021 | United Kingdom | November 1975 | 93, Fleet Road, Fleet, Hampshire, GU51 3PJ, United Kingdom |
| NEAL, Nathan John, Mr. RESIGNED | Director | 31 Aug 2001 | 02 Nov 2004 | England | March 1967 | 22 Chapel St, Steeple Bumpstead, Haverhill, Suffolk, CB9 7DQ |
| PORTER, Robert Charles RESIGNED | Director | 01 Aug 2006 | 20 Mar 2009 | England | August 1954 | 29 Bracken Gardens, Barnes, London, SW13 9HW |
| POWELL, Loretta RESIGNED | Director | 17 Feb 2006 | 03 Dec 2010 | United Kingdom | August 1954 | 5 Lakeside Business Park, Swan Lane, Sandhurst, Berkshire, GU47 9DN |
| PRICE, Gregory Laurence RESIGNED | Director | 06 Sep 2021 | 30 Sep 2024 | England | January 1976 | 93, Fleet Road, Fleet, Hampshire, GU51 3PJ, United Kingdom |
| ROSE, Nigel George RESIGNED | Director | 31 Aug 2001 | 05 Aug 2011 | England | January 1963 | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, United Kingdom |
| ROUTS, Stanley Alan Frederick RESIGNED | Director | | 31 Aug 2001 | | May 1939 | 25 Langham Road, Teddington, Middlesex, TW11 9HF |
| SPINK, Geoffrey RESIGNED | Director | 27 Jul 2004 | 31 Aug 2011 | United Kingdom | April 1949 | 5 Lakeside Business Park, Swan Lane, Sandhurst, Berkshire, GU47 9DN |
| WEATHERSTONE, Andrew Paul RESIGNED | Director | 24 Sep 2019 | 24 Sep 2020 | England | January 1964 | C/O Checkit Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA, England |
| WILSON, John Frederick RESIGNED | Director | 31 Aug 2011 | 24 Sep 2019 | England | April 1976 | C/O Elektron Technology Plc, Broers Building, 21 J J Thomson Avenue, Cambridge, CB3 0FA |