| CLAYTON, Damien John ACTIVE | Director | 12 May 2025 | | United Kingdom | June 1971 | 83, Tower Road North, Warmley, Bristol, BS30 8XP, United Kingdom |
| GREEN, Andrew Samuel, Dr ACTIVE | Director | 16 Nov 2016 | | United Kingdom | February 1964 | Corby Hub, 4 Sallow Road, Weldon North Industrial Estate, Corby, NN17 5JX, United Kingdom |
| MILES, Mark William ACTIVE | Director | 01 Jul 2019 | | United States | June 1971 | Corby Hub, 4 Sallow Road, Weldon North Industrial Estate, Corby, NN17 5JX, United Kingdom |
| ZWARTHOF, Sander ACTIVE | Director | 01 Apr 2024 | | Netherlands | July 1975 | Corby Hub, 4 Sallow Road, Weldon North Industrial Estate, Corby, NN17 5JX, United Kingdom |
| BROOKSBANK, Raymond Bernard RESIGNED | Secretary | 05 Jan 1994 | 31 Aug 2012 | | | Grassyards House Brisbane Glen, Largs, Ayrshire, KA30 8SN |
| GILES, Nicholas David Martin RESIGNED | Secretary | 31 Dec 2016 | 10 Jul 2019 | | | Sapphire House, Crown Way, Rushden, NN10 6FB, England |
| HAMILTON, Deborah RESIGNED | Secretary | 10 Jul 2019 | 10 Apr 2026 | | | Corby Hub, 4 Sallow Road, Weldon North Industrial Estate, Corby, NN17 5JX, United Kingdom |
| KANE, Hilary Anne RESIGNED | Secretary | 01 Sep 2012 | 31 Dec 2016 | | | British Polythene Industries, 96 Port Glasgow Road, Greenock, Renfrewshire, PA15 2UL, Scotland |
| MACDONALD, Angus Neilson RESIGNED | Secretary | | 05 Jan 1994 | | | Creachann 22 Tannoch Drive, Milngavie, Glasgow, Lanarkshire, G62 8AS |
| BUNNELL, John RESIGNED | Director | | 13 May 1999 | United Kingdom | May 1947 | Of Little Orchard Goodshelter, East Portlemouth, Salcombe, Devon, TQ8 8PA |
| COPPEL, Laurence Adrian RESIGNED | Director | | 13 May 2004 | United Kingdom | May 1939 | 8 Eagle Close, Beeston, Nottingham, Nottinghamshire, NG9 3DY |
| DOORENBOSCH, Franciscus Lodewijk Paulus RESIGNED | Director | 16 Nov 2016 | 29 Apr 2020 | Netherlands | December 1964 | Sapphire House, Crown Way, Rushden, NN10 6FB, England |
| DUTHIE, David George RESIGNED | Director | 16 Nov 2016 | 30 Apr 2019 | Scotland | January 1956 | Sapphire House, Crown Way, Rushden, Northamptonshire, NN10 6FB, England |
| DUTHIE, Robin, Sir RESIGNED | Director | | 13 May 1999 | United Kingdom | October 1928 | 181 Finnart Street, Greenock, Renfrewshire, PA16 8JA |
| GILES, Nicholas David Martin RESIGNED | Director | 09 Sep 2016 | 31 Dec 2016 | England | July 1971 | Sapphire House, Crown Way, Rushden, NN10 6FB, England |
| GREENE, Jason Kent RESIGNED | Director | 01 Jul 2019 | 12 May 2025 | United States | April 1970 | Corby Hub, 4 Sallow Road, Weldon North Industrial Estate, Corby, NN17 5JX, United Kingdom |
| GROSSART, Hamish Mcleod RESIGNED | Director | 04 Apr 2005 | 01 Aug 2016 | Scotland | April 1957 | One, London Wall, London, EC2Y 5AB |
| HAGMAN, Eric RESIGNED | Director | 14 Jun 2002 | 12 May 2011 | | July 1946 | 42 Sutherland Avenue, Pollokshields, Glasgow, G41 4ET |
| HARRIS, Alan RESIGNED | Director | 30 Apr 2019 | 03 May 2024 | Scotland | January 1970 | Sapphire House, Crown Way, Rushden, Northamptonshire, NN10 6FB, England |
| HARRIS, David William RESIGNED | Director | 24 Jul 2009 | 31 Oct 2016 | Scotland | January 1972 | One, London Wall, London, EC2Y 5AB |
| HOOD, Neil, Professor RESIGNED | Director | 26 Feb 1998 | 02 Feb 2006 | | August 1943 | 95 Mote Hill, Hamilton, Lanarkshire, ML3 6EA |
| HOUSTON, John Mclellan RESIGNED | Director | 13 May 1999 | 11 May 2006 | | July 1944 | The Rock, 3 Douglas Avenue, Langbank, PA14 6PE |
| KESTERTON, Simon John RESIGNED | Director | 09 Sep 2016 | 01 Jul 2019 | England | November 1973 | Sapphire House, Crown Way, Rushden, NN10 6FB, England |
| LANGLANDS, John Thomson RESIGNED | Director | 01 Oct 1994 | 31 Jan 2017 | Scotland | April 1952 | One, London Wall, London, EC2Y 5AB |
| LEECH, John RESIGNED | Director | | 21 Mar 1997 | | June 1944 | 5 Grange Gardens Templewood Avenue, Hampstead, London, NW3 7XG |
| LINDSAY, James Randolph, Earl Of Lindsay RESIGNED | Director | 20 Mar 2006 | 12 May 2015 | Scotland | November 1955 | One, London Wall, London, EC2Y 5AB |
| MACDONALD, Angus Neilson RESIGNED | Director | | 01 Oct 1994 | | August 1935 | 6 Reres Gardens, Broughty Ferry, Dundee, DD5 2XA |
| MARSH, Ronald John Edward RESIGNED | Director | 07 Mar 2011 | 01 Aug 2016 | United Kingdom | August 1950 | 1, London Wall, London, EC2Y 5AB |
| MCLATCHIE, Cameron RESIGNED | Director | | 28 Feb 2017 | Scotland | February 1947 | One, London Wall, London, EC2Y 5AB |
| PATON, John Ferguson RESIGNED | Director | | 16 May 2002 | | March 1948 | Tudor House 9 The Crescent, Skelmorlie, Ayrshire, PA17 5DX |
| RUSSELL, Ian Simon Macgregor RESIGNED | Director | 01 Jul 2011 | 01 Aug 2016 | United Kingdom | January 1953 | One, London Wall, London, EC2Y 5AB |
| STENNING, Keith Jeffery RESIGNED | Director | 03 Mar 1995 | 16 May 2002 | England | May 1943 | 137 Durleigh Road, Bridgwater, Somerset, TA6 7JF |
| STONE, Rex RESIGNED | Director | | 14 May 1998 | United Kingdom | August 1938 | Chevin Mount, Farnah Green Belper, Derby, Derbyshire, DE56 2UP |
| THORBURN, Anne RESIGNED | Director | 03 Mar 2003 | 24 Jul 2009 | Scotland | July 1960 | 18 Lawmarnock Crescent, Bridge Of Weir, Renfrewshire, PA11 3AS |
| VERVAAT, Petrus Rudolf Maria RESIGNED | Director | 09 Sep 2016 | 01 Jul 2019 | Netherlands | April 1965 | Sapphire House, Crown Way, Rushden, NN10 6FB, England |
| WARNOCK, David RESIGNED | Director | 18 Aug 2009 | 01 Aug 2016 | United Kingdom | January 1958 | One, London Wall, London, EC2Y 5AB |