| DUNLOP, Lorraine Amanda ACTIVE | Secretary | 20 Jan 2020 | | | | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW |
| CHADDA, Sanjeet ACTIVE | Director | 31 Jul 2017 | | United Kingdom | May 1978 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW |
| JOHNSON, Kevin ACTIVE | Director | 09 Jun 2026 | | United Kingdom | May 1963 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW |
| CONE, Harry Douglas RESIGNED | Secretary | 26 Feb 1999 | 31 Jan 2001 | | | 5 The Orchard, Hepscott, Morpeth, Northumberland, NE61 6HT |
| GRAHAM, William RESIGNED | Secretary | 27 Apr 1998 | 26 Feb 1999 | | | 23 Pinegarth, Darras Hall, Ponteland, Northumberland, NE20 9LF, England |
| HAMILTON, John Andrew RESIGNED | Secretary | 02 Feb 2011 | 09 Apr 2018 | | | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| HIGGINS, Caroline Patricia RESIGNED | Secretary | 01 Feb 2001 | 31 Aug 2002 | | | 24 Mayfield Road, Gosforth, Newcastle Upon Tyne, Tyne & Wear, NE3 4HE |
| A G SECRETARIAL LIMITED RESIGNED | Secretary | 01 Jan 2004 | 31 Oct 2009 | | | 100 Barbirolli Square, Manchester, M2 3AB |
| CLIFFORD CHANCE SECRETARIES LIMITED RESIGNED | Secretary | 03 Sep 2002 | 31 Dec 2003 | | | 10 Upper Bank Street, London, E14 5JJ |
| EXCELLET INVESTMENTS LIMITED RESIGNED | Secretary | 09 Feb 1998 | 06 Mar 1998 | | | Senator House, 85 Queen Victoria Street, London, EC4V 4JL |
| OAKWOOD CORPORATE SECRETARY LIMITED RESIGNED | Secretary | 01 Nov 2009 | 02 Feb 2010 | | | Webber House, 26-28 Market Street, Altrincham, Cheshire, WA14 1PF |
| SISEC LIMITED RESIGNED | Secretary | 06 Mar 1998 | 27 Apr 1998 | | | 21 Holborn Viaduct, London, EC1A 2DY |
| SISEC LIMITED RESIGNED | Nominee Secretary | 22 Aug 1997 | 09 Feb 1998 | | | 21 Holborn Viaduct, London, EC1A 2DY |
| ACKHURST, Trent Braden RESIGNED | Director | 26 May 2007 | 01 Sep 2007 | United Kingdom | June 1970 | Hollyhurst, Hepscott, Morpeth, Northumberland, NE61 6LX |
| AL-MAHMOUD, Meshaal Mohamed RESIGNED | Director | 01 May 2012 | 16 Aug 2015 | Qatar | April 1976 | Al Sadd Building, Al Sadd Street, Doha, 70, Qatar |
| AL-MANA, Ali Abdulla RESIGNED | Director | 12 Oct 2015 | 03 Jul 2017 | Qatar | May 1983 | World Trade Center, West Bay, PO BOX 3212, Doha, Qatar |
| AL-MOHANNADI, Said Mubarak Said RESIGNED | Director | 07 May 2010 | 01 Feb 2013 | Qatar | June 1956 | Villa No 14 Altaif Street, Area 32, Madinat Khalifa North, Doha, Qatar |
| AL-MUHANNADI, Saad Rashid Mohammed RESIGNED | Director | 01 Feb 2013 | 03 Jul 2017 | Qatar | March 1966 | Al-Handasa, Al-Khubaib Street, Doha, 00974, Qatar |
| AL-SHABI, Abdulrahman Ahmad Abdulrahman RESIGNED | Director | 07 May 2010 | 01 May 2012 | Qatar | January 1965 | Finance Department, Qatar Petroleum, Doha |
| AL-SULAITI, Ahmad Saif Ahmad RESIGNED | Director | 07 May 2010 | 03 Jul 2017 | Qatar | January 1959 | Operations Department, Qatar Petroleum, Dukhan, Qatar |
| BATHGATE, Adam RESIGNED | Director | 24 Sep 2007 | 07 May 2010 | United Kingdom | October 1961 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| BELLAMY, Michael RESIGNED | Director | 31 Jul 2017 | 09 Jun 2026 | United Kingdom | October 1962 | Ge Oil & Gas, Pii Pipeline Solutions, Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| BELLAMY, Michael RESIGNED | Director | 24 Mar 2010 | 07 May 2010 | United Kingdom | October 1962 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW |
| BERGER, Christopher Carl RESIGNED | Director | 26 May 2007 | 12 Sep 2008 | | September 1967 | 56 Percy Park, Tynemouth, Tyne & Wear, NE30 4JX |
| BERTONI, Fernando RESIGNED | Director | 07 May 2010 | 01 May 2013 | Italian | August 1967 | Nuovo Pignone S.P.A., Via Felice Matteucci 2, Florence, 50127, FOREIGN, Italy |
| BUCANEVE, Giovanni RESIGNED | Director | 18 Mar 2002 | 25 May 2007 | | October 1953 | Via Della Chiesa 24, Florence, 50125, FOREIGN, Italy |
| BUCCI, John Vincent RESIGNED | Director | 24 Sep 2007 | 23 Mar 2010 | | December 1954 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| CARTLEDGE, Andrew RESIGNED | Director | 03 Sep 2002 | 26 Oct 2003 | | June 1969 | 30 Trailside Road, Weston, MA 02493, United States |
| CHRISTIE, Roderick Angus RESIGNED | Director | 03 Sep 2002 | 16 Sep 2004 | | April 1962 | 14 Oakfield Road, Bourne End, Buckinghamshire, SL8 5QN |
| CLARK, Alyson Margaret RESIGNED | Director | 03 Sep 2002 | 25 May 2007 | United Kingdom | September 1958 | 13 Heron's Place, Old Isleworth, Middlesex, TW7 7BE |
| DANIEL, Paul Nigel RESIGNED | Director | 03 Sep 2002 | 06 Nov 2002 | | February 1961 | 7 Lucerne Drive, Stadhampton, Oxford, Oxfordshire, OX44 7QT |
| DE MARCHIS, Ranieri RESIGNED | Director | 18 Mar 2002 | 01 May 2003 | | January 1961 | Via Delle Campora 36, Florence, 50124, FOREIGN, Italy |
| DE SMEDT, Raymond Andre RESIGNED | Director | 28 Jan 1999 | 09 Dec 2005 | | February 1939 | Apartment G 48 Berkeley Square, London, W1X 5DB |
| DIGBY, Mark Damien RESIGNED | Director | 07 Feb 2005 | 03 Oct 2006 | | April 1961 | Calle Valle Del Roncal 71,, Las Lomas, Boadilla Del Monte, Madrid, 28660, Spain |
| GRAHAM, William RESIGNED | Director | 27 Apr 1998 | 30 Sep 2002 | | January 1953 | The Coach House, Shortridge Hall, Warkworth, Northumberland, NE64 0XU |
| GREEN, Charles Edward Seager RESIGNED | Director | 27 Jan 2000 | 18 Mar 2002 | | March 1964 | 32 Mayford Road, London, SW12 8SD |
| HEILMANN, Matthias RESIGNED | Director | 21 Apr 2016 | 18 Jul 2017 | United States | November 1968 | 2623, Camino Ramon, San Ramon, California, 94583, Usa |
| HEINTZELMAN, Daniel Clifford RESIGNED | Director | 01 Feb 2012 | 25 Oct 2013 | Italy | March 1957 | Nuovo Pignone S.P.A., Via Felice Matteucci 2, Florence, Tuscany, 50127, Italy |
| HORNBY, Ian RESIGNED | Director | 02 May 2008 | 07 May 2010 | United Kingdom | May 1976 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| JACOB, Frances Carol RESIGNED | Director | 20 Feb 1998 | 18 Mar 2002 | | April 1959 | 11 Augustus Court, Augustus Road Southfields, London, SW19 6NA |
| KEENAN, John Joseph RESIGNED | Director | 01 Aug 2005 | 24 Oct 2007 | | November 1966 | 5 Gresham Road, Brentwood, Essex, CM14 4HN |
| LITTLE, Daniel Stephen Paul RESIGNED | Director | 02 May 2008 | 01 Sep 2009 | England | January 1976 | 48 Chester Road, Poynton, Stockport, Cheshire, SK12 1HA |
| MANN, Cynthia Kay RESIGNED | Director | 26 May 2007 | 02 May 2008 | | January 1958 | 5302 Cambridge, Sugar Land, Texas, United States |
| MCBRIDE, Kristopher Ryan RESIGNED | Director | 07 Dec 2015 | 11 Oct 2022 | United States | October 1974 | 1100, Technology Park Drive, Billerica, Massachusetts, 01821, United States |
| MULHOLLAND, Diarmaid Patrick RESIGNED | Director | 03 Oct 2006 | 25 May 2007 | Italy | May 1971 | Largo Zandonai 4, Milan 20145, FOREIGN, Italy |
| NAJAR, Jean Claude RESIGNED | Director | 18 Mar 2002 | 15 Sep 2005 | | August 1952 | Via Di Quarto 34 Int, Bagno A Ripoli, Florence, 50012, FOREIGN, Italy |
| PALMER, Brian Conrad RESIGNED | Director | 01 May 2013 | 01 Feb 2016 | United States | September 1958 | 1100, Technology Park Drive, Billerica, Massachusetts, 01821, Usa |
| PAPARONI, Marco Renato Bruno RESIGNED | Director | 12 Sep 2008 | 07 May 2010 | | May 1964 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| POULIQUEN, Patrick RESIGNED | Director | 18 Mar 2002 | 12 Feb 2004 | | April 1963 | 17 Rue Leon Deubel, Belfort, F 9000, France |
| POWELL, Michael Anthony RESIGNED | Director | 20 Feb 1998 | 31 Jul 2002 | | July 1943 | 31 Love Lane, Pandon Quays, Newcastle Upon Tyne, NE1 3DW |
| RIBIERAS, Frederic RESIGNED | Director | 07 May 2010 | 05 Feb 2014 | Italy | April 1965 | Nuovo Pignone S.P.A., Via Felice Matteucci 2, Florence, 50127, FOREIGN, Italy |
| ROGERSON, Philip Graham RESIGNED | Director | 20 Feb 1998 | 08 Apr 2002 | | January 1945 | 56 Vogans Mill, Mill Street, London, SE1 2BZ |
| SANTIAGO PONSA, Claudio RESIGNED | Director | 07 May 2010 | 01 Feb 2012 | Italy | September 1956 | Nuovo Pignone S.P.A, Via Felice Matteucci 2, Florence, 50127, FOREIGN, Italy |
| SANTIAGO PONSA, Claudio RESIGNED | Director | 18 Mar 2002 | 25 May 2007 | Italy | September 1956 | Via Suor Maria Celeste 20, Florence, 50125, FOREIGN, Italy |
| SHARMAN, Jeremy William RESIGNED | Director | 20 Feb 1998 | 27 Jan 2000 | England | April 1963 | Harborough Hill House, Gretton, Northamptonshire, NN17 3DD |
| SIMMONS, Michael James RESIGNED | Director | 08 Apr 2004 | 30 Sep 2006 | | October 1963 | 405 Bunker Hill, Houston, Texas, 77024, United States |
| SIMONELLI, Lorenzo RESIGNED | Director | 25 Oct 2013 | 17 Jul 2017 | United Kingdom | July 1973 | The Ark, 201 Talgarth Road, Hammersmith, London, W6 8BJ, United Kingdom |
| SLOAN, Alasdair Murray Campbell RESIGNED | Director | 02 May 2008 | 07 May 2010 | | March 1967 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW, United Kingdom |
| TON, Gwaine William RESIGNED | Director | 12 Sep 2003 | 20 Jul 2005 | | July 1958 | Beech Hill Lodge, Ridgemead Road, Englefield Green, Egham, Surrey, TW20 0YD |
| WAKE, Hilary Anne, Mrs. RESIGNED | Director | 07 Feb 2005 | 25 May 2007 | United Kingdom | August 1959 | The Coach House, Bridge Farm Newland, Eastrington, DN14 7XD |
| WORRELL, Brian RESIGNED | Director | 05 Feb 2014 | 07 Dec 2015 | United Kingdom | February 1970 | Atley Way, North Nelson Industrial Estate, Cramlington, Northumberland, NE23 1WW |
| LOVITING LIMITED RESIGNED | Nominee Director | 22 Aug 1997 | 09 Feb 1998 | | | 21 Holborn Viaduct, London, EC1A 2DY |
| QUICKNESS LIMITED RESIGNED | Director | 08 Feb 1998 | 20 Feb 1998 | | | Senator House, 85 Queen Victoria Street, London, EC4V 4JL |
| SERJEANTS' INN NOMINEES LIMITED RESIGNED | Nominee Director | 22 Aug 1997 | 09 Feb 1998 | | | 21 Holborn Viaduct, London, EC1A 2DY |