| STEWART, Claire Susan ACTIVE | Secretary | 04 Mar 2019 | | | | Synectics House, 34 Broadfield Close, Sheffield, S8 0XN, England |
| BEDFORD, David Michael ACTIVE | Director | 06 Jan 2020 | | England | January 1968 | Synectics House, 34 Broadfield Close, Sheffield, S8 0XN, England |
| BESWICK, Simon RESIGNED | Secretary | 30 Nov 2018 | 04 Mar 2019 | | | Synectics House, 3-4 Broadfield Close, Sheffield, S8 0XN, England |
| BRIERLEY, Richard Paul RESIGNED | Secretary | 17 Jun 2016 | 06 Apr 2018 | | | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS |
| GERAGHTY, Paul Kevin Ian RESIGNED | Secretary | 01 Nov 2002 | 15 Dec 2005 | | | Monkwood Cottage, Whitakers Way, Loughton, Essex, IG10 1SQ |
| GOODMAN, David Robert RESIGNED | Secretary | 05 Aug 1994 | 30 May 1995 | | | 19 Southern Road, London, N2 9LH |
| HISCOCK, Bruce Edward Heath RESIGNED | Secretary | 30 Sep 1998 | 01 Nov 2002 | | | 2 Webbs Cottages, The Green, North Warnborough, Hampshire, RG29 1HF |
| MACAULAY, George Robertson RESIGNED | Secretary | | 30 Jun 1994 | | | 35a Devonia Road, London, N1 8JQ |
| MIGHELL, Howard Stanley RESIGNED | Secretary | 30 May 1995 | 30 Sep 1998 | | | 25 Goldings Close, Kings Hill, West Malling, Kent, ME19 4BE |
| OCONNOR, Michael John Anthony RESIGNED | Secretary | 30 Jun 1994 | 05 Aug 1994 | | | 12 The Bulwark, Brecon, Powys, LD3 7AD |
| POULTNEY, Nigel Charles RESIGNED | Secretary | 15 Dec 2005 | 11 May 2016 | | | 4 Holt Road, Studley, Warwickshire, B80 7NX |
| STILWELL, Michael James RESIGNED | Secretary | 06 Apr 2018 | 30 Nov 2018 | | | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS |
| BESWICK, Simon RESIGNED | Director | 30 Nov 2018 | 18 Apr 2019 | Scotland | July 1964 | Synectics House, 3-4 Broadfield Close, Sheffield, S8 0XN, England |
| BRIERLEY, Richard Paul RESIGNED | Director | 17 Jun 2016 | 06 Apr 2018 | United Kingdom | March 1976 | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS |
| BROOK, Anthony Donald RESIGNED | Director | 05 Sep 1994 | 30 May 1995 | | September 1936 | 18 Brookvale Road, Highfield, Southampton, Hampshire, SO17 1QP |
| BURN, James Richard RESIGNED | Director | | 30 May 1995 | | May 1967 | 32 Whitehall Street, Aylesbury, Buckinghamshire, HP20 2JW |
| CHILVERS, Stuart George RESIGNED | Director | | 30 May 1995 | | August 1947 | 36a Horsell Road, London, N5 1XP |
| GERAGHTY, Paul Kevin Ian RESIGNED | Director | 01 Nov 2002 | 15 Mar 2006 | United Kingdom | November 1960 | Monkwood Cottage, Whitakers Way, Loughton, Essex, IG10 1SQ |
| GOLDRING, Timothy Nicholas RESIGNED | Director | 31 Jan 1995 | 30 May 1995 | | September 1953 | North House, Hall Drive, Gosfield Halstead, Essex, CO9 1SX |
| GOODWIN, Mark Gerald RESIGNED | Director | 06 Apr 2018 | 18 Apr 2019 | England | June 1972 | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS |
| HISCOCK, Bruce Edward Heath RESIGNED | Director | 08 Dec 1998 | 31 May 2005 | United Kingdom | November 1958 | 2 Webbs Cottages, The Green, North Warnborough, Hampshire, RG29 1HF |
| LARNDER, Amanda Louise RESIGNED | Director | 18 Apr 2019 | 06 Jan 2020 | England | July 1980 | Synectics House, 34 Broadfield Close, Sheffield, S8 0XN, England |
| MACAULAY, George Robertson RESIGNED | Director | | 30 May 1995 | | January 1956 | 35a Devonia Road, London, N1 8JQ |
| MIGHELL, Howard Stanley RESIGNED | Director | 30 May 1995 | 06 Dec 1997 | United Kingdom | December 1962 | 25 Goldings Close, Kings Hill, West Malling, Kent, ME19 4BE |
| MOIR, William John Wallace RESIGNED | Director | 31 May 2005 | 15 Dec 2005 | United Kingdom | May 1938 | Shrublands, Lockhampton Hill, Cheltenham, Gloucestershire, GL53 9QJ |
| MOIR, William John Wallace RESIGNED | Director | 06 Aug 2001 | 01 Nov 2002 | United Kingdom | May 1938 | Shrublands, Lockhampton Hill, Cheltenham, Gloucestershire, GL53 9QJ |
| PARKER, Philip Hull RESIGNED | Director | 06 Mar 2000 | 06 Aug 2001 | | February 1946 | 1 Quarry Lane, Lower Shiplake, Henley, Oxfordshire, RG9 3JW |
| POULTNEY, Nigel Charles RESIGNED | Director | 15 Dec 2005 | 11 May 2016 | England | May 1957 | 4 Holt Road, Studley, Warwickshire, B80 7NX |
| REES, Christopher David RESIGNED | Director | 09 Jan 1995 | 30 May 1995 | | April 1963 | 3 Cannon Lane, Pinner, Middlesex, HA5 1HH |
| RICKS, Roy William RESIGNED | Director | 30 May 1995 | 08 Dec 1998 | | February 1946 | 87 St Marys Drive, Benfleet, Essex, SS7 1LH |
| SHEPHERD, John, Mr. RESIGNED | Director | 06 May 2010 | 31 Jan 2015 | United Kingdom | December 1953 | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS, United Kingdom |
| SINGLETON, Russell Craig RESIGNED | Director | 15 Dec 2005 | 06 May 2010 | England | January 1959 | 417 Whirlowdale Road, Sheffield, South Yorkshire, S11 9NG |
| SMITH, Clive Alan RESIGNED | Director | 10 Feb 1999 | 06 Mar 2000 | | June 1954 | The Spinney Devenish Lane, Ascot, Berkshire, SL5 9QU |
| STILWELL, Michael James RESIGNED | Director | 31 Jan 2015 | 30 Nov 2018 | England | February 1976 | Studley Point, 88 Birmingham Road, Studley, Warwickshire, B80 7AS |
| TOVEY, Brian John Maynard, Sir RESIGNED | Director | 05 Sep 1994 | 08 Feb 1999 | | April 1926 | 8 Cresswell Gardens, London, SW5 0BJ |