| HALFORD, Amanda Christine ACTIVE | Director | 01 Jul 2026 | | United Kingdom | December 1968 | Unit 5a - Calibre Scientific House,, R-Evolution@The Advanced Manufacturing Park,, Selden Way, Catcliffe,, Rotherham,, S60 5XA, United Kingdom |
| SHAKEEL, Usman ACTIVE | Director | 01 Jul 2026 | | United States | February 1988 | Unit 5a - Calibre Scientific House,, R-Evolution@The Advanced Manufacturing Park,, Selden Way, Catcliffe,, Rotherham,, S60 5XA, United Kingdom |
| WALL, Brian Michael ACTIVE | Director | 29 Oct 2021 | | France | June 1973 | Unit 5a - Calibre Scientific House,, R-Evolution@The Advanced Manufacturing Park,, Selden Way, Catcliffe,, Rotherham,, S60 5XA, United Kingdom |
| CONWAY, Robin RESIGNED | Secretary | 01 Aug 2001 | 01 Apr 2006 | | | 10 Queen Victoria Court, Farnborough, Hampshire, GU14 8AR |
| OLDHAM, Debra Jane RESIGNED | Secretary | 07 Jan 1994 | 01 Aug 2001 | | | 18 Higgs Lane, Bagshot, Surrey, GU19 5DP |
| PULLINGER, Lesley RESIGNED | Secretary | 01 Apr 2006 | 31 Mar 2015 | | | Unit E, Lutyens Ind Centre, Bilton Road, Kingsland Business Park,, Basingstoke, Hampshire, RG24 8LJ |
| SLEAP, Jacqueline Helen RESIGNED | Secretary | 15 Apr 2015 | 29 Oct 2021 | | | Unit E, Lutyens Ind Centre, Bilton Road, Kingsland Business Park,, Basingstoke, Hampshire, RG24 8LJ |
| COMBINED SECRETARIAL SERVICES LIMITED RESIGNED | Nominee Secretary | 06 Jan 1994 | 07 Jan 1994 | | | Victoria House, 64 Paul Street, London, EC2A 4NG |
| ALLAN, James Mark RESIGNED | Director | 01 Aug 2023 | 15 Feb 2024 | United Kingdom | December 1967 | 2, Lamtarra Way, Newbury, RG14 7WB, England |
| BROWNLEADER, Michael Daniel, Dr RESIGNED | Director | 29 Oct 2021 | 25 May 2022 | England | January 1967 | Salisbury House, Station Road, Cambridge, CB1 2LA, United Kingdom |
| CONWAY, Michelle Leigh RESIGNED | Director | 15 Jul 2009 | 29 Oct 2021 | England | August 1974 | Unit E, Lutyens Ind Centre, Bilton Road, Kingsland Business Park,, Basingstoke, Hampshire, RG24 8LJ |
| CONWAY, Robin RESIGNED | Director | 07 Jan 1994 | 29 Oct 2021 | England | July 1955 | Unit E, Lutyens Ind Centre, Bilton Road, Kingsland Business Park,, Basingstoke, Hampshire, RG24 8LJ |
| DRURY, Michael Thomas RESIGNED | Director | 29 Oct 2021 | 29 Jul 2022 | United States | February 1964 | Calibre Scientific, 6201 Trust Drive, Holland, Ohio, 43528, United States |
| FINKELSTEIN, Neil RESIGNED | Director | 01 Apr 1994 | 17 Oct 1994 | | April 1946 | 1 Hunter Drive, Rye Brook, New York, 10573, Usa |
| HAYNES, Jonathan RESIGNED | Director | 01 Aug 2001 | 08 May 2006 | | August 1965 | 26 Woodgate Road, Wootton, Northampton, NN4 6ET |
| HEIDINGER, Joyce Ann RESIGNED | Director | 01 Aug 2023 | 31 May 2025 | United States | May 1965 | 6201, Trust Drive, Holland, Ohio, 43523, United States |
| KADIA, Siddhartha RESIGNED | Director | 01 Jan 2025 | 30 Jun 2026 | United States | August 1969 | Unit 5a - Calibre Scientific House,, R-Evolution@The Advanced Manufacturing Park,, Selden Way, Catcliffe,, Rotherham,, S60 5XA, United Kingdom |
| KANE, Benson RESIGNED | Director | 17 Oct 1994 | 31 Jul 2001 | | March 1932 | Prudential Centre Apartments, The Gloucster Suite 27c, 770 Boylston Street, Boston Massachustits, Usa |
| KULLBACK, William Jay, Mr. RESIGNED | Director | 02 Jun 2025 | 30 Jun 2026 | United States | October 1959 | Unit 5a - Calibre Scientific House,, R-Evolution@The Advanced Manufacturing Park,, Selden Way, Catcliffe,, Rotherham,, S60 5XA, United Kingdom |
| PULLINGER, Lesley RESIGNED | Director | 01 Apr 2006 | 31 Mar 2015 | United Kingdom | September 1952 | Unit E, Lutyens Ind Centre, Bilton Road, Kingsland Business Park,, Basingstoke, Hampshire, RG24 8LJ |
| SWEENEY, Sean RESIGNED | Director | 17 Oct 1994 | 31 Jul 2001 | | May 1947 | 38 Lamplighter Drive, Shrewsbury, Ma, 01545, Usa |
| TRAVIS, Benjamin Ross RESIGNED | Director | 29 Oct 2021 | 31 Dec 2024 | United States | October 1975 | C/O Stonecalibre, Llc 2049, Century Park East, Suite 2550, Los Angeles, CA 90067, United States |
| COMBINED NOMINEES LIMITED RESIGNED | Nominee Director | 06 Jan 1994 | 07 Jan 1994 | | | Victoria House, 64 Paul Street, London, EC2A 4NA |
| COMBINED SECRETARIAL SERVICES LIMITED RESIGNED | Nominee Director | 06 Jan 1994 | 07 Jan 1994 | | | Victoria House, 64 Paul Street, London, EC2A 4NG |