| FERGUSON, John ACTIVE | Director | 14 Apr 2020 | | United Kingdom | December 1981 | W. Sam White Building, Peterseat Drive, Altens, Aberdeen, AB12 3HT, United Kingdom |
| MARSH, Martin Graham ACTIVE | Director | 20 Nov 2025 | | Scotland | April 1977 | W. Sam White Building, Peterseat Drive, Altens, Aberdeen, AB12 3HT, Scotland |
| COLEMAN, Richard Henry RESIGNED | Secretary | 18 Jul 1994 | 30 Aug 1994 | | | Old School House, Abbots Worthy, Winchester, Hampshire, SO21 1DR |
| GOODSWEN, Anne RESIGNED | Secretary | 01 Feb 2000 | 26 Oct 2001 | | | Olivefield, Church Lane, Awbridge, Hampshire, SO51 0HN |
| JOYCE, Wendy Annette RESIGNED | Secretary | 02 Aug 2006 | 14 Apr 2020 | | | PO BOX 11, Winnington Avenue, Northwich, Cheshire, CW8 4DX |
| LEE, Carl Richmond RESIGNED | Secretary | 30 Jun 2006 | 02 Aug 2006 | | | 63 Grove Park, Knutsford, Cheshire, WA16 8QE |
| LEE, Carl Richmond RESIGNED | Secretary | 30 Sep 2002 | 30 Apr 2004 | | | 63 Grove Park, Knutsford, Cheshire, WA16 8QE |
| RISINO, Anthony John, Dr RESIGNED | Secretary | 30 Apr 2004 | 30 Jun 2006 | | | 34 Holdford Moss, Sandymoor, Warrington, Cheshire, WA7 1XB |
| THWAITES, Michael William RESIGNED | Secretary | 30 Aug 1994 | 01 Feb 2000 | | | Forge Cottage, Old Alresford, Hampshire, SO24 9DL |
| TOOLEY, Rebecca Ann RESIGNED | Secretary | 26 Oct 2001 | 30 Sep 2002 | | | Lyndhurst Lodge, Copythorne Common Copythorne, Southampton, Hampshire, SO40 2PG |
| WATERLOW SECRETARIES LIMITED RESIGNED | Nominee Secretary | 13 Apr 1994 | 18 Jul 1994 | | | 6-8 Underwood Street, London, N1 7JQ |
| AFZAL, Muhammad Sanaullah RESIGNED | Director | 14 Apr 2020 | 20 Nov 2025 | United Arab Emirates | July 1978 | Championx Gulf, Jebel Ali Freezone, Dubai, United Arab Emirates |
| BELL, Bradley RESIGNED | Director | 31 Dec 2003 | 01 Jun 2009 | | September 1952 | 28 Muirfield Circle, Wheaton, Du Page Illinois 60187, Usa |
| BILLETTE DE VILLEMEUR, Eric RESIGNED | Director | 28 Jun 2019 | 14 Apr 2020 | France | March 1985 | Winnington Avenue, Northwich, Cheshire, CW8 4DX, United Kingdom |
| BLAIR, David John RESIGNED | Director | 11 Feb 2002 | 31 Dec 2003 | | January 1954 | 3552 Stackinghay Drive, Naperville, Usa, IL60564 |
| BLEIER, Herbert Adolph, Dr RESIGNED | Director | 30 Aug 1994 | 31 Mar 1998 | | July 1946 | 2 Woodlands, Wallington, Fareham, Hampshire, PO16 8UH |
| DRYDEN, Philip Westgarth RESIGNED | Director | 01 Jan 1997 | 31 Oct 1997 | England | April 1956 | Beaulieu, The Ridge Cold Ash, Newbury, West Berkshire, RG18 9HZ |
| GAMBLE, John Denman RESIGNED | Director | 31 Mar 2014 | 28 Jun 2019 | United Kingdom | November 1962 | Winnington Avenue, Northwich, Cheshire, CW8 4DX, United Kingdom |
| HART, Susan Lee RESIGNED | Director | 14 Apr 2020 | 20 Nov 2025 | United Arab Emirates | January 1981 | Championx Gulf, Jebel Ali Freezone, Dubai, United Arab Emirates |
| HEY, Paul RESIGNED | Director | 28 Jun 2019 | 14 Apr 2020 | England | October 1964 | Winnington Avenue, Northwich, Cheshire, CW8 4DX, United Kingdom |
| JOHNSON, David RESIGNED | Director | 09 Feb 2009 | 15 Jul 2013 | | November 1960 | PO BOX 11, Winnington Avenue, Northwich, Cheshire, CW8 4DX |
| JUNG, Frederic Alain Marie RESIGNED | Director | 25 Mar 2004 | 05 Dec 2008 | | May 1963 | 5247 N Magnolia Avenue, Chicago, Il 60640, FOREIGN, United States |
| LEE, Carl Richmond RESIGNED | Director | 30 Apr 2004 | 28 Jun 2019 | England | May 1963 | PO BOX 11, Winnington Avenue, Northwich, Cheshire, CW8 4DX |
| MALLEY, Paul RESIGNED | Director | 05 Apr 2002 | 07 May 2004 | England | September 1964 | 28 High Elm Road, Hale Barns, Cheshire, WA15 0HS |
| PIZZONI, Vincenzo Maria Paola (Vince), Professor RESIGNED | Director | 31 Mar 1998 | 23 Aug 2005 | United Kingdom | May 1954 | 37 Broad Street, Ludlow, Shropshire, SY8 1NL |
| SMITH, James RESIGNED | Director | 08 Aug 2009 | 31 Mar 2014 | Wales | April 1961 | 20, Broadoaks, Rossett, Wrexham, Clwyd, LL12 0FA |
| SMITH, Michael Robert RESIGNED | Director | 18 Jul 1994 | 28 Mar 2002 | | January 1940 | 7 Cranemoor Avenue, Highcliffe, Dorset, BH23 5AN |
| SUTLEY, John Russel RESIGNED | Director | 30 Aug 1994 | 01 Nov 1999 | | March 1943 | P O Box 87, Sugarland, Texas 77487-0087, Usa |
| TOOLEY, Rebecca Ann RESIGNED | Director | 11 Feb 2002 | 30 Sep 2002 | | April 1970 | Lyndhurst Lodge, Copythorne Common Copythorne, Southampton, Hampshire, SO40 2PG |
| VICKERS, Frank Paul RESIGNED | Director | 31 Mar 1998 | 07 Feb 2003 | | July 1949 | 49 Endeavour Way, Hythe, Southampton, Hampshire, SO45 6DX |
| WATERLOW NOMINEES LIMITED RESIGNED | Nominee Director | 13 Apr 1994 | 18 Jul 1994 | | | 6-8 Underwood Street, London, N1 7JQ |