| GLOVER, Lucy ACTIVE | Secretary | 21 Jul 2025 | | | | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| FURLONGER, Marc ACTIVE | Director | 19 Apr 2018 | | England | September 1972 | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| GLOVER, Lucy ACTIVE | Director | 14 Jan 2022 | | England | June 1982 | Level 10, 255 Blackfriars Road, London, SE1 9AX, England |
| BUCHAN, Jennifer Susan RESIGNED | Secretary | 03 Aug 2000 | 15 Nov 2001 | | | Highdown, Greenway Road, Blockley, Gloucestershire, GL56 9BQ |
| BURDETT, Neil Robert RESIGNED | Secretary | 28 Nov 2008 | 05 Apr 2017 | | | 2nd, Floor, Cardinal Place 80 Victoria Street, London, SW1E 5JL |
| GILLESPIE, Fiona Margaret RESIGNED | Secretary | 21 Apr 2017 | 14 Jan 2022 | | | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| GRANT, Stephen Martin RESIGNED | Secretary | | 30 Sep 1992 | | | 2 Beechwood Close, Battledown, Cheltenham, Gloucestershire, GL52 6QQ |
| LILLYCROP, David Peter RESIGNED | Secretary | 06 Sep 1993 | 03 Aug 2000 | | | Canal Cottage, Halton Village, Buckinghamshire, HP22 5NS |
| 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 |
| PENN, David Alfred RESIGNED | Secretary | 15 Nov 2001 | 28 Nov 2008 | | | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| WALKER, Denis RESIGNED | Secretary | 30 Sep 1992 | 30 Sep 1993 | | | 28 Lionel Street, Burnley, Lancashire, BB12 6DY |
| BRAIN, Bruce RESIGNED | Director | | 31 Oct 1992 | United Kingdom | June 1941 | West Sevington Farmhouse, Yatton Keynell, Chippenham, Wiltshire, SN15 4NB |
| 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 |
| 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 | 23 Dec 1997 | 10 May 2002 | United Kingdom | January 1950 | Green Hedges, 25 Saint Johns Street, Crowthorne, Berkshire, RG45 7NJ |
| EDWARDS, Lionel Anthony RESIGNED | Director | 09 Aug 1993 | 20 Nov 1998 | Uk | November 1944 | Wincott Hill Farm, Whichford, Shipston On Stour, CV36 5PQ |
| GARNER, Michael Frederick RESIGNED | Director | | 09 Aug 1993 | United Kingdom | April 1937 | Old Drews, Knotty Green, Beaconsfield, Buckinghamshire, HP9 2TT |
| GILLESPIE, Fiona Margaret RESIGNED | Director | 21 Apr 2017 | 14 Jan 2022 | England | August 1969 | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| HAWKES, Jeffrey Michael RESIGNED | Director | 01 Jun 2006 | 30 Jul 2007 | | May 1947 | 8 St Faiths Close, Newton Longville, Milton Keynes, Buckinghamshire, MK17 0BA |
| KENNEDY, Thomas Lawrie, Air Chief Marshall Sir RESIGNED | Director | | 30 Sep 1992 | | May 1928 | Garden Cottage, Stockshill Manton, Oakham, Rutland, LE15 8SY |
| LEWINTON, Christopher, Sir RESIGNED | Director | | 04 Dec 2000 | England | January 1932 | Downs House, Letcombe Bassett, Wantage, Oxfordshire, OX12 9LW |
| LIGHTFOOT, James Robinson RESIGNED | Director | | 01 Jun 1993 | | December 1940 | High Roding, Beechwood Close, Battledown, Gloucestershire, GL52 6QQ |
| LILLYCROP, David Peter RESIGNED | Director | 23 Dec 1997 | 01 Jun 2006 | United Kingdom | June 1956 | 765 Finchley Road, London, NW11 8DS |
| MCKEOWN, Matthew Robin RESIGNED | Director | 21 Nov 2017 | 19 Apr 2018 | England | January 1980 | C/O Smiths Group Plc, 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| NORRIS, Guy Mervyn RESIGNED | Director | 04 Dec 1998 | 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 | 01 Sep 2003 | 28 Nov 2008 | England | February 1958 | 2 Salmons Lane, Middleton Cheney, Banbury, Oxon, OX17 2NF |
| RALPH, Alexandra RESIGNED | Director | 26 Nov 2013 | 21 Nov 2017 | England | July 1974 | 4th Floor, 11-12 St James's Square, London, SW1Y 4LB, England |
| ROE, James Lawrence RESIGNED | Director | 23 Dec 1997 | 03 Aug 2000 | United Kingdom | June 1944 | 235 Thame Road, Warborough, Wallingford, Oxfordshire, OX10 7DH |
| SAUNDERS, Denis RESIGNED | Director | | 13 Nov 1998 | | April 1934 | Lime Tree House 3 Tapster Court, Bushwood Lane, Lapworth, Warwickshire, B94 5PJ |
| SUMNER, Anthony John RESIGNED | Director | 09 Aug 1993 | 13 Nov 1998 | | December 1931 | Manor Farm House, Taynton, Burford, Oxfordshire, OX18 4UB |
| TAYLOR, Sidney RESIGNED | Director | | 09 Aug 1993 | | August 1934 | Home Farm-Manor Road, Towersey, Thame, Oxon, OX9 3QS |
| WALSH, Brian Augustine RESIGNED | Director | 09 Aug 1993 | 30 Sep 1997 | | May 1944 | Rye Lodge Cokes Lane, Chalfont St Giles, Buckinghamshire, HP8 4TZ |