| IRVINE, Alastair Campbell ACTIVE | Director | 13 Jul 2021 | | England | November 1977 | Century House, Maylands Avenue, Hemel Hempstead, HP2 7DE, United Kingdom |
| MCINNES, Alain Charles ACTIVE | Director | 27 Feb 2018 | | United Kingdom | July 1974 | C/O Smiths Detection-Watford Limited, Century House, Maylands Avenue, Hemel Hempstead, Hertfordshire, HP2 7DE, England |
| DOHERTY, Shaun RESIGNED | Secretary | 09 Jul 2012 | 01 Apr 2014 | | | C/O Smiths Detection-Watford Limited, 459 Park Avenue, Bushey, Watford, Herts, WD23 2BW, United Kingdom |
| GILLESPIE, Fiona Margaret RESIGNED | Secretary | 31 Jul 2007 | 04 Feb 2009 | | | 79 Blake Apartments, New River Avenue, London, N8 7QF |
| LIU, Lili RESIGNED | Secretary | 07 May 2014 | 20 Apr 2017 | | | 1, Sheldon Square, Paddington, London, W2 6TT, United Kingdom |
| PENN, David Alfred RESIGNED | Secretary | | 31 Jul 2007 | | | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| RONEY, Ryan Lee RESIGNED | Secretary | 04 Feb 2009 | 31 Jan 2011 | | | 3818, Shetland Court, Frederick, Md, 21704, Usa |
| VALLANCE, Ian RESIGNED | Secretary | 31 Jan 2011 | 09 Jul 2012 | | | 23, Stradbroke Grove, Buckhurst Hill, Essex, IG9 5PD, United Kingdom |
| DOHERTY, Shaun, Dr RESIGNED | Director | 09 Jul 2012 | 01 Apr 2014 | United Kingdom | October 1968 | C/O Smiths Detection-Watford Limited, 459 Park Avenue, Bushey, Watford, Herts, WD23 2BW, United Kingdom |
| DUNSMORE, Alan David RESIGNED | Director | 03 Feb 2009 | 31 Jan 2010 | United Kingdom | September 1969 | 31, Northway, London, NW11 6PB |
| EDWARDS, John Ralph RESIGNED | Director | 10 Aug 2000 | 10 May 2002 | United Kingdom | January 1950 | Green Hedges, 25 Saint Johns Street, Crowthorne, Berkshire, RG45 7NJ |
| KING, Liam Peter RESIGNED | Director | 20 Apr 2017 | 13 Jul 2021 | United Kingdom | August 1985 | C/O Smiths Detection-Watford Limited, Century House, Maylands Avenue, Hemel Hempstead, Hertfordshire, HP2 7DE, England |
| LILLYCROP, David Peter RESIGNED | Director | | 10 Aug 2000 | | June 1956 | Canal Cottage, Halton Village, Buckinghamshire, HP22 5NS |
| LIU, Lili RESIGNED | Director | 07 May 2014 | 20 Apr 2017 | United Kingdom | February 1972 | 1, Sheldon Square, Paddington, London, W2 6TT, United Kingdom |
| MCINNES, Alain Charles RESIGNED | Director | 17 Jan 2015 | 07 Nov 2016 | United Kingdom | July 1974 | C/O Smiths Detection-Watford Limited, 459 Park Avenue, Bushey, Watford, Herts, WD23 2BW, United Kingdom |
| NORRIS, Guy Mervyn RESIGNED | Director | 10 Aug 2000 | 31 Jul 2007 | | May 1946 | The Dower House, Church Road Snitterfield, Stratford Upon Avon, CV37 0LF |
| O'BRIEN, Susan Lynn RESIGNED | Director | 31 Jul 2007 | 31 Jul 2008 | | April 1968 | 180 Longfield Lane, Cheshunt, Waltham Cross, Hertfordshire, EN7 6AQ |
| PAYNE, Stuart Jeffrey RESIGNED | Director | 07 Nov 2016 | 28 Feb 2018 | Wales | December 1977 | 1, Sheldon Square, Paddington, London, W2 6TT, United Kingdom |
| PENN, David Alfred RESIGNED | Director | 31 Jul 2007 | 03 Feb 2009 | England | February 1958 | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| RONEY, Ryan Lee RESIGNED | Director | 03 Feb 2009 | 31 Jan 2011 | United States | October 1972 | 3818, Shetland Court, Frederick, Md, 21704, Usa |
| RUBACK, Daniel David RESIGNED | Director | 31 Jan 2014 | 17 Jan 2015 | England | August 1977 | C/O Smiths Detection-Watford Limited, 459 Park Avenue, Bushey, Watford, Herts, WD23 2BW, United Kingdom |
| SAUNDERS, Denis RESIGNED | Director | | 31 Oct 1997 | | April 1934 | Lime Tree House 3 Tapster Court, Bushwood Lane, Lapworth, Warwickshire, B94 5PJ |
| TAYLOR, Susannah Natalie RESIGNED | Director | 31 Jan 2011 | 31 Jan 2014 | United Kingdom | July 1975 | C/O Smiths Detection-Watford Limited, 459 Park Avenue, Bushey, Watford, Herts, WD23 2BW, United Kingdom |
| TEMPLETON, Kenneth Nelson RESIGNED | Director | | 10 Aug 2000 | United Kingdom | May 1939 | Orchard Grange, The Street Brightwell-Cum-Sotwell, Wallingford, Oxfordshire, OX10 0RX |
| VALLANCE, Ian RESIGNED | Director | 08 Feb 2010 | 09 Jul 2012 | England | February 1969 | 23, Stradbroke Grove, Buckhurst Hill, Essex, IG9 5PD, United Kingdom |
| WALKER, Denis RESIGNED | Director | | 15 Aug 1993 | | June 1956 | 28 Lionel Street, Burnley, Lancashire, BB12 6DY |