| GLOVER, Lucy ACTIVE | Secretary | 21 Jul 2025 | | | | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| GLOVER, Lucy ACTIVE | Director | 10 Apr 2026 | | England | June 1982 | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| KENNY, Alexander St. John Stopford ACTIVE | Director | 29 Jul 2019 | | England | May 1971 | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| GILLESPIE, Fiona Margaret RESIGNED | Secretary | 28 Nov 2008 | 14 Jan 2022 | | | 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| HOBBS, Jeffrey Jacques RESIGNED | Secretary | | 04 Nov 1996 | | | 1 Cedar Copse, Bromley, Kent, BR1 2NY |
| MACANDREWS, Laura Struan RESIGNED | Secretary | 14 Jan 2022 | 01 Mar 2024 | | | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| MALONEY, Kiera Nicole RESIGNED | Secretary | 01 Mar 2024 | 21 Jul 2025 | | | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| NORRIS, Guy Mervyn RESIGNED | Secretary | 15 Oct 1998 | 11 Jan 2001 | | | The Dower House, Church Road Snitterfield, Stratford Upon Avon, CV37 0LF |
| PEACHEY, Cedric William RESIGNED | Secretary | 04 Nov 1996 | 15 Oct 1998 | | | 22 Norroy Road, London, SW15 1PF |
| PENN, David Alfred RESIGNED | Secretary | 11 Jan 2001 | 28 Nov 2008 | | | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| ANGLE, Martin David RESIGNED | Director | 23 Jul 1998 | 04 Dec 2000 | England | April 1950 | Cantorist House, Childrey, Wantage, Oxfordshire, OX12 9UJ |
| BROAD, Donald Andrew Robertson RESIGNED | Director | 17 Dec 2008 | 30 Sep 2013 | United Kingdom | May 1951 | 2nd, Floor, Cardinal Place 80 Victoria Street, London, SW1E 5JL |
| BURDETT, Neil Robert RESIGNED | Director | 31 Jul 2007 | 05 Apr 2017 | England | June 1955 | 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| BURDETT, Neil Robert RESIGNED | Director | 10 Aug 2001 | 30 Jul 2002 | | | 5 Oak House Parson Street, Hendon, London, NW4 1QJ |
| CAMERON, Sarah Louise RESIGNED | Director | 28 Nov 2008 | 30 Sep 2014 | | October 1964 | 2nd, Floor, Cardinal Place 80 Victoria Street, London, SW1E 5JL |
| EDWARDS, John Ralph RESIGNED | Director | 11 Jan 2001 | 10 May 2002 | United Kingdom | January 1950 | Green Hedges, 25 Saint Johns Street, Crowthorne, Berkshire, RG45 7NJ |
| EDWARDS, Lionel Anthony RESIGNED | Director | 23 Jul 1998 | 30 Nov 1998 | Uk | November 1944 | Wincott Hill Farm, Whichford, Shipston On Stour, CV36 5PQ |
| FAGGE, Julian RESIGNED | Director | 26 Nov 2013 | 07 Dec 2017 | England | June 1973 | 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| HASLEHURST, Peter Joseph Kinder RESIGNED | Director | | 31 Dec 1998 | England | March 1941 | Old Crowholt Farm, Cowbrook Lane Gawsworth, Macclesfield, Cheshire, SK11 0JH |
| HAWKES, Jeffrey Michael RESIGNED | Director | 01 Jun 2006 | 30 Jul 2007 | | May 1947 | 8 St Faiths Close, Newton Longville, Milton Keynes, Buckinghamshire, MK17 0BA |
| HOBBS, Jeffrey Jacques RESIGNED | Director | | 23 Jul 1998 | | March 1943 | 1 Cedar Copse, Bromley, Kent, BR1 2NY |
| LAULE, William Joseph RESIGNED | Director | 23 Jul 1998 | 04 Dec 2000 | | September 1948 | 25 Ennismore Mews, London, SW7 1AP |
| LILLYCROP, David Peter RESIGNED | Director | 23 Jul 1998 | 01 Jun 2006 | United Kingdom | June 1956 | 765 Finchley Road, London, NW11 8DS |
| MASTERS, Julian Gerald RESIGNED | Director | 01 Oct 1994 | 31 May 2006 | United Kingdom | February 1946 | The Wildings Malacca Farm, West Clandon, Guildford, Surrey, GU4 7UG |
| MILLS, John Michael RESIGNED | Director | 08 Mar 2019 | 31 Jul 2021 | United Kingdom | January 1964 | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| MONTAGUE, George James RESIGNED | Director | 13 Dec 2017 | 26 Jul 2019 | England | November 1964 | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| NORRIS, Guy Mervyn RESIGNED | Director | 23 Dec 1999 | 31 Jul 2007 | | May 1946 | The Dower House, Church Road Snitterfield, Stratford Upon Avon, CV37 0LF |
| O'BRIEN, Susan Lynn RESIGNED | Director | 30 Jul 2007 | 31 Jul 2008 | | April 1968 | 180 Longfield Lane, Cheshunt, Waltham Cross, Hertfordshire, EN7 6AQ |
| PENN, David Alfred RESIGNED | Director | 31 May 2006 | 28 Nov 2008 | England | February 1958 | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| RALPH, Bruce Charles RESIGNED | Director | 01 Jan 1994 | 23 Jul 1998 | | August 1939 | Leckhampton Grange, Leckhampton Hill, Cheltenham, Gloucestershire, GL53 9QH |
| REED, Richard Finbar Denys RESIGNED | Director | | 31 Dec 1993 | | May 1926 | Robin Hill Brudenall Avenue, Canford Cliffe, Poole, Dorset |
| ROWLANDS, Melanie Jane RESIGNED | Director | 05 Apr 2017 | 06 Mar 2019 | United Kingdom | August 1968 | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| WALTERS, Michael Quentin RESIGNED | Director | | 31 Dec 1993 | | October 1927 | Derryfield Cottage, Ashton Keynes, Swindon, Wiltshire |
| WHYTE, Matthew John RESIGNED | Director | 01 Aug 2021 | 10 Apr 2026 | England | March 1974 | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| WOODING, Norman, Sir RESIGNED | Director | 01 Jan 1994 | 23 Jul 1998 | | April 1927 | Boss Lane House Boss Lane, Hughenden Valley, High Wycombe, Buckinghamshire, HP14 4LQ |
| WORMSLEY, Bertram Howard RESIGNED | Director | | 23 Jul 1998 | | October 1930 | 69 Hervey Road, Blackheath, London, SE3 8BX |
| WRIGHT, Frederick Keith RESIGNED | Director | 01 Jul 1994 | 31 Dec 1999 | Uk | February 1944 | 27 Queensgate, Bramhall, Stockport, Cheshire, SK7 1JT |