| MCCOLL, Andrew ACTIVE | Secretary | 10 Dec 2025 | | | | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD, England |
| KIENZL, Nico Hubert ACTIVE | Director | 12 Nov 2020 | | United States | April 1971 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD, England |
| MCCUMISKEY, Warren ACTIVE | Director | 10 Mar 2025 | | England | January 1974 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD, England |
| SEEL, David Christopher ACTIVE | Director | 10 Mar 2025 | | England | April 1980 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD, England |
| JOSSERAND, Tate Evelyn RESIGNED | Secretary | 16 Jun 2021 | 10 Dec 2025 | | | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD, England |
| LEWIS, Pamela Frances RESIGNED | Secretary | 01 Sep 1995 | 01 Jun 2017 | | | Flat 5, 26-28 Bartholomew Square, London, EC1V 3QH, England |
| MARSHALL, Stephen RESIGNED | Secretary | 23 Sep 1992 | 01 Sep 1995 | | | 3 St James Close, Eastcote, Ruislip, Middlesex, HA4 9EQ |
| MCCUMISKEY, Warren RESIGNED | Secretary | 01 Jun 2017 | 16 Jun 2021 | | | 21, Sandringham Drive, Dartford, DA2 7WJ, England |
| MURRAY, David RESIGNED | Secretary | | 23 Sep 1992 | | | 16 Crediton Road, London, NW10 3DU |
| ARNOTT, Alan Michael RESIGNED | Director | 01 Sep 1995 | 30 Sep 1996 | | July 1948 | 9 Greatham Road, Maidenbower, Crawley, West Sussex, RH10 7JJ |
| BELLEW, Patrick John RESIGNED | Director | | 31 Dec 2024 | England | June 1959 | Cherry Tree Barn, Searl's Lane, London Road, Hook, Hampshire, RG27 9EQ, England |
| DAVEY, Meredith William Thorold RESIGNED | Director | 01 Apr 2015 | 12 Nov 2020 | England | April 1979 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD |
| FINE, Wong Heang RESIGNED | Director | 12 Nov 2020 | 30 Sep 2022 | Singapore | April 1958 | 168, Jalan Bukit Merah, #01-01 Connection One, Singapore |
| GRACE, James RESIGNED | Director | 01 Aug 2002 | 10 Jan 2007 | United Kingdom | April 1968 | 11 High Street, Croxton, St Neots, Cambridgeshire, PE19 6SX |
| JOSSERAND, Tate Evelyn RESIGNED | Director | 01 Jan 2018 | 12 Nov 2020 | England | January 1971 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD |
| LEWIS, Pamela Frances RESIGNED | Director | 01 Sep 1995 | 12 Nov 2020 | England | June 1943 | Flat 5, 26-28 Bartholomew Square, London, EC1V 3QH, England |
| MARSHALL, Stephen RESIGNED | Director | | 31 Dec 2007 | England | June 1952 | 21 Kirby Close, Northwood, Middlesex, HA6 3NQ |
| MCCUMISKEY, Warren RESIGNED | Director | 24 May 2018 | 12 Nov 2020 | England | January 1974 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD |
| PASZYNSKI, Tadeusz Wieslaw RESIGNED | Director | 01 Jun 2014 | 12 Nov 2020 | England | November 1958 | 7, Moreton End Lane, Harpenden, Hertfordshire, AL5 2EY, England |
| POOLOGASUNDRAM, Sri Hari RESIGNED | Director | 12 Nov 2020 | 25 Nov 2024 | Singapore | June 1962 | 38, Cleantech Loop #01-31, Singapore, 636741, Singapore |
| RICHARDS, David Philip RESIGNED | Director | 18 Jul 2019 | 12 Nov 2020 | England | June 1967 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD |
| RITCHIE, William John Peter RESIGNED | Director | 01 Jan 2011 | 12 Nov 2020 | Scotland | September 1964 | 7a, Westbourne Drive, Bearsden, Glasgow, Glasgo, G61 4BD, Scotland |
| SCHOFIELD, Nicholas RESIGNED | Director | 01 Apr 2011 | 14 Dec 2016 | United Kingdom | October 1961 | 19 Perseverance Works, 38 Kingsland Road, London, E2 8DD |
| SEEL, David Christopher RESIGNED | Director | 12 Nov 2020 | 25 Nov 2024 | England | April 1980 | First Floor, Harling House, 47-51 Great Suffolk Street, London, Se1 0bs, England |
| SMITH, Mark John RESIGNED | Director | 01 Aug 2002 | 25 Jun 2014 | United Kingdom | September 1964 | 25 Lady Grove, Welwyn Garden City, Hertfordshire, AL7 4DS |
| TEO, Say Hong RESIGNED | Director | 12 Nov 2020 | 16 Aug 2024 | Singapore | April 1973 | 38, Cleantech Loop #01-31, Singapore, 636741, Singapore |
| THOMAS, Neil RESIGNED | Director | | 31 Aug 1995 | | March 1959 | 47 Glebe Street, London, W4 |
| WICKRAMASINGHE, Anuran Claude RESIGNED | Director | 01 Oct 2012 | 01 Apr 2015 | England | January 1959 | 18, Cow Roast, Tring, Hertfordshire, HP23 5RF, England |
| YEO, Choon Chong RESIGNED | Director | 01 Oct 2022 | 25 Nov 2024 | Singapore | October 1963 | 38, Cleantech Loop #01-31, Singapore, 636741, Singapore |