| CLARKE, Dean Leonard ACTIVE | Secretary | 19 Dec 2023 | | | | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| AMIRI, Iraj ACTIVE | Director | 03 Feb 2021 | | United Kingdom | February 1954 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| CHARLES -JONES, Lucinda Claire ACTIVE | Director | 28 Aug 2025 | | United Kingdom | June 1966 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| COOPER, Kirstine Ann ACTIVE | Director | 27 Jun 2024 | | United Kingdom | August 1964 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| DAVIES, Neil Richard ACTIVE | Director | 01 May 2025 | | United Kingdom | June 1968 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| JUDD, Carole Ann ACTIVE | Director | 02 May 2023 | | United Kingdom | June 1959 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| KING, Steven Michael ACTIVE | Director | 02 Dec 2024 | | United Kingdom | April 1975 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| KUS, Tracy Lee ACTIVE | Director | 07 Aug 2026 | | United Kingdom | January 1972 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| LAING, Andrew Charles Gordon ACTIVE | Director | 10 Oct 2025 | | United Kingdom | December 1965 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| MADELL, Helene ACTIVE | Director | 05 Aug 2026 | | United Kingdom | July 1967 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| WINLOW, Mark ACTIVE | Director | 09 Jul 2024 | | United Kingdom | April 1962 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| CRUTTWELL, Edward Robert Charles RESIGNED | Secretary | 26 Jun 2008 | 08 Jun 2010 | | | 8, Devonshire Square, London, EC2M 4PL |
| DIGNAM, Emma RESIGNED | Secretary | 14 Apr 2023 | 19 Dec 2023 | | | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| HILL, John Lawrence RESIGNED | Secretary | | 31 Dec 2005 | | | 8 Devonshire Square, London, EC2M 4PL |
| HOGWOOD, Paul Arthur RESIGNED | Secretary | 08 Jun 2010 | 28 Jun 2019 | | | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| OWEN, Elizabeth Jane RESIGNED | Secretary | 01 Jan 2006 | 26 Jun 2008 | | | 8 Devonshire Square, London, EC2M 4PL |
| VERO, Tobias Henry RESIGNED | Secretary | 02 Jul 2019 | 14 Apr 2023 | | | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| ALLEN, Anthony Simon Echalaz RESIGNED | Director | 14 Apr 2010 | 26 Feb 2014 | United Kingdom | January 1957 | 8, Devonshire Square, London, EC2M 4PL |
| AMBROSE, David Charles RESIGNED | Director | 01 Jul 1997 | 31 Dec 2000 | England | June 1953 | 21 Furze Road, Oxshott, Surrey, KT22 0UR |
| AMY, Ronald John RESIGNED | Director | 27 Sep 2007 | 30 Sep 2011 | United Kingdom | June 1950 | 8 Devonshire Square, London, EC2M 4PL |
| AMY, Ronald John RESIGNED | Director | 01 Jan 2001 | 30 Jun 2005 | United Kingdom | June 1950 | 8 Devonshire Square, London, EC2M 4PL |
| ATKINS, Richard Charles RESIGNED | Director | 01 May 2009 | 24 Oct 2018 | England | February 1952 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| BAILEY, Marshall Charles RESIGNED | Director | 31 Jan 2023 | 25 Sep 2023 | United Kingdom | June 1966 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| BODEN, Anne Elizabeth RESIGNED | Director | 01 Jan 2001 | 30 Jun 2005 | | January 1960 | 8 Devonshire Square, London, EC2M 4PL |
| BOLGER, David RESIGNED | Director | 30 Jun 2005 | 27 Sep 2007 | | August 1957 | 8 Devonshire Square, London, EC2M 4PL |
| BOOTH, Clement Burns RESIGNED | Director | 28 Jan 2004 | 30 Jun 2005 | United Kingdom | July 1954 | 8 Devonshire Square, London, EC3M 4PL |
| BROWN, Robert Iain Cameron RESIGNED | Director | 31 Mar 2009 | 04 Feb 2014 | United Kingdom | January 1966 | 8, Devonshire Square, London, EC2M 4PL |
| BRYAN, Colin Thomas RESIGNED | Director | 01 Jan 2003 | 31 Dec 2004 | England | July 1948 | 10 Devonshire Square, London, EC2M 4PL |
| BRYAN, Colin Thomas RESIGNED | Director | 01 Jul 1997 | 01 Jan 2001 | | July 1948 | Foxdeane, Wilderness Road, Chislehurst, Kent, BR7 5EZ |
| BRYANT, Stuart Joseph RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | England | August 1953 | Belvedere House, 29 Church Road, Tunbridge Wells, Kent, TW1 1ER |
| BURNSIDE, Bryan RESIGNED | Director | 01 Nov 1993 | 31 Dec 1995 | | October 1935 | West Garth, High Trees Road, Reigate, Surrey, RH2 7EJ |
| CANTLAY, Charles Peter Thrale RESIGNED | Director | 01 Jul 1997 | 01 Jan 2001 | England | February 1954 | Quornden Emmetts Lane, Ide Hill, Sevenoaks, Kent, TN14 6BD |
| CARNEGIE-BROWN, Bruce Neil RESIGNED | Director | 29 Oct 2012 | 04 Nov 2015 | United Kingdom | December 1959 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| CHANNELL, Herbert Rocker RESIGNED | Director | 17 Dec 1998 | 31 Dec 2000 | | August 1952 | 590 North Sheridan Road, Lake Forest, Illinois, 60045, Usa |
| CHESSHER, Mark Christopher RESIGNED | Director | 30 Jan 2009 | 08 Apr 2011 | | November 1960 | 8, Devonshire Square, London, EC2M 4PL |
| CHILTON, Frederick Paul RESIGNED | Director | 01 Nov 1993 | 31 Dec 2000 | United Kingdom | July 1946 | St Leonards Farm, Fryerning, Ingatestone, Essex, CM4 0PB |
| CHRISTIAN, Dominic Gerard RESIGNED | Director | 14 Apr 2010 | 31 Jul 2018 | England | October 1960 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| CLARK, Adrian Denis George RESIGNED | Director | 10 Nov 2011 | 18 Jun 2014 | United Kingdom | May 1955 | 8, Devonshire Square, London, EC2M 4PL, United Kingdom |
| COLLINS, Gregory Eugene Mary RESIGNED | Director | 08 Jun 2000 | 31 Dec 2000 | United Kingdom | October 1958 | Holywell, Devenish Road, Sunningdale, Berkshire, SL5 9QP |
| COLLS, Alan Howard Crawfurd RESIGNED | Director | 01 Jul 1997 | 31 Dec 1997 | | December 1941 | 23 Victoria Road, London, W8 5RF |
| CULLEN, John Charles RESIGNED | Director | 01 Oct 2007 | 30 Jan 2009 | United Kingdom | November 1964 | 8 Devonshire Square, London, EC2M 4PL |
| DICKSON, Olivia Catherine RESIGNED | Director | 01 Jan 2006 | 30 Jan 2009 | United Kingdom | December 1960 | Aon Limited, 8 Devonshire Square, London, EC2M 4PL |
| DOBBS, Peter Joseph RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | United Kingdom | October 1955 | 7 Routh Road, Wandsworth Common, London, SW18 3SW |
| DUDLEY, Richard James RESIGNED | Director | 01 Oct 2014 | 21 Feb 2022 | England | March 1970 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| EVANS, David Ioan RESIGNED | Director | 29 Jan 1998 | 05 May 1999 | United Kingdom | May 1944 | Cantref, 32 Hammond End, Farnham Common, Buckinghamshire, SL2 3LG |
| FILLINGHAM, Timothy RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | | May 1961 | 2 Burlington Lodge Studios, Rigault Road, London, SW6 4JJ |
| FORCEY, David John RESIGNED | Director | 01 Apr 1998 | 31 Dec 2000 | England | December 1943 | 35 Wandle Road, London, SW17 7DL |
| FOX, Stuart Keith RESIGNED | Director | 01 Jan 2001 | 30 Jun 2005 | | February 1953 | 8 Devonshire Square, London, EC2M 4PL |
| FRANKLAND, Nicholas Charles RESIGNED | Director | 17 Nov 2017 | 26 Sep 2022 | England | June 1958 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| GANDER, Simon Marsland RESIGNED | Director | 18 Jun 2015 | 14 Sep 2017 | England | May 1965 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| GORE RANDALL, Philip Allan RESIGNED | Director | 01 Jan 2004 | 16 Sep 2007 | | December 1952 | Aon Ltd, 8 Devonshire Square, London, EC2M 4PL |
| GRIFFIN, Alan Frank RESIGNED | Director | 01 Mar 1996 | 31 Dec 2000 | | March 1951 | Cold Hall White Stubbs Lane, Broxbourne, Hertfordshire, EN10 7PZ |
| GRUPE, Jurgen RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | | August 1937 | Jurgensallee 17, D-22609 Hamburg, FOREIGN, Germany |
| HALSEY, Alison Margaret RESIGNED | Director | 18 Jun 2015 | 31 May 2021 | England | January 1956 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| HARDMAN, Nicholas John RESIGNED | Director | 07 Apr 2011 | 03 May 2023 | United Kingdom | November 1966 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| HARMER, Peter Geoffrey RESIGNED | Director | 22 Jan 2007 | 30 Sep 2009 | | December 1960 | 8, Devonshire Square, London, EC2M 4PL |
| HARRISON, Robert Graham RESIGNED | Director | 01 Jan 2001 | 01 Apr 2003 | | December 1939 | 61 Chester Row, London, SW1W 8JL |
| HENNESSY, Karl Peter RESIGNED | Director | 27 Mar 2014 | 09 Sep 2016 | England | June 1963 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| HERBERT, James Neville RESIGNED | Director | 10 Nov 2011 | 31 Mar 2016 | United Kingdom | June 1965 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| HOWLAND JACKSON, Anthony Geoffrey Clive RESIGNED | Director | 26 Nov 1997 | 31 Dec 1999 | Uk | May 1941 | Little Loveney Hall, Wakes Colne, Colchester, Essex, CO6 2BH |
| ILES, Ronald Alfred RESIGNED | Director | | 12 Jun 1997 | | December 1935 | Sherwood House, Roundwood Lane, Lindfield, West Sussex, RH16 1SJ |
| JACKSON, Keith Thomas RESIGNED | Director | 03 Feb 2016 | 26 May 2017 | England | April 1960 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| JEFFREYS, Simon John Lewis RESIGNED | Director | 01 May 2009 | 14 Feb 2023 | United Kingdom | September 1952 | 215, Euston Road, London, NW1 2BE |
| JOHNSTON, John Edward RESIGNED | Director | 01 Jan 2001 | 17 Mar 2001 | | November 1935 | Brackens Hillcrest, Dormans Park, East Grinstead, Sussex, RH12 2LX |
| KAVANAUGH, John Lawrence RESIGNED | Director | 01 Jul 1997 | 31 Dec 1999 | England | March 1944 | 44 Leeward Court, Asher Way, London, E1W 2JZ |
| KIELTY-O'GARA, Jane Elizabeth RESIGNED | Director | 24 Jun 2024 | 23 Jun 2026 | United Kingdom | September 1976 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| KIMBER, Matthew Paul RESIGNED | Director | 27 Feb 2018 | 11 Dec 2025 | United Kingdom | November 1968 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| KNAUDT, Horst RESIGNED | Director | 24 Oct 1997 | 31 Dec 1999 | | September 1940 | Salomon-Heine-Weg 42a, 20251 Hamburg, Germany, FOREIGN |
| LARKIN, Reginald William RESIGNED | Director | | 01 Nov 1993 | | June 1938 | 49 Holmoaks, Rainham, Gillingham, Kent, ME8 7DN |
| LEDGER, David George RESIGNED | Director | 04 Mar 2008 | 31 Mar 2018 | England | April 1957 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| MAHONEY, Dennis Leonard RESIGNED | Director | | 28 Feb 2007 | United Kingdom | September 1950 | 8 Devonshire Square, London, EC2M 4PL |
| MANDUCA, Paul Victor Falzon Sant RESIGNED | Director | 01 Jan 2006 | 07 Sep 2012 | United Kingdom | November 1951 | 22 Rutland Gate, London, SW7 1BB |
| MARJORIBANKS, Francis Nigel RESIGNED | Director | | 28 Sep 2007 | | July 1952 | 8 Devonshire Square, London, EC2M 4PL |
| MCGILL, Stephen Phillip RESIGNED | Director | 22 Jan 2007 | 30 Jan 2009 | | February 1958 | 8, Devonshire Square, London, EC2M 4PL |
| MCKENZIE, Ross Lindsay RESIGNED | Director | 01 Nov 1993 | 11 Nov 2003 | | June 1946 | 8 Devonshire Square, London, EC2M 4PL |
| MEAD, David Stanley RESIGNED | Director | 21 Nov 2007 | 30 Jun 2009 | | June 1958 | 8 Devonshire Square, London, EC2M 4PL |
| MEAD, David Stanley RESIGNED | Director | 02 Sep 2002 | 30 Jun 2005 | | June 1958 | 8 Devonshire Square, London, EC2M 4PL |
| MILTON, Paul Jeffrey RESIGNED | Director | 01 Jul 1997 | 31 Dec 2000 | | December 1952 | Hoblands Kemnal Road, Chislehurst, Kent, BR7 6LY |
| MOORE, Rupert James St. Aubyn RESIGNED | Director | 26 Sep 2022 | 10 Oct 2025 | United Kingdom | December 1977 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| NELSON, Farah RESIGNED | Director | 03 May 2023 | 15 Aug 2024 | United Kingdom | April 1976 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| NICHOLSON, John James RESIGNED | Director | 20 Apr 2016 | 31 Mar 2025 | United Kingdom | March 1953 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| ORAM, William John RESIGNED | Director | 01 Nov 1993 | 31 Dec 2000 | | May 1953 | Touchwood, 120a Woodland Way, West Wickham, Kent, BR4 9LU |
| OWEN, Elizabeth Jane RESIGNED | Director | 08 Jun 2000 | 26 Feb 2008 | | March 1953 | 8 Devonshire Square, London, EC2M 4PL |
| PAGE, Julie Anne RESIGNED | Director | 14 Jul 2017 | 24 Jun 2024 | England | February 1967 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| PALMER BROWN, Jonathan Angus David Joseph RESIGNED | Director | 01 Jul 1997 | 09 Jul 2009 | United Kingdom | March 1951 | 8 Devonshire Square, London, EC2M 4PL |
| PETTIGREW, James Neilson RESIGNED | Director | 07 Feb 2012 | 31 Oct 2014 | United Kingdom | July 1958 | 8, Devonshire Square, London, EC2M 4PL, United Kingdom |
| PICKERING, Anthony Blatchford RESIGNED | Director | 01 Jul 1997 | 31 Jan 1998 | | June 1946 | Badgers Holt The Drive, Belmont, Sutton, Surrey, SM2 7DP |
| PINSENT, Antony Andrew Macpherson RESIGNED | Director | 01 Jul 1997 | 28 Feb 1999 | | February 1946 | 2 Landridge Road, London, SW6 4LE |
| POWELL, Roger Charles Jeremy RESIGNED | Director | 01 Jan 2001 | 15 Apr 2003 | United Kingdom | July 1956 | Welcombe Bank Farm Ingon Lane, Snitterfield, Stratford Upon Avon, Warwickshire, CV37 0QE |
| RICHMOND, Carol Ann RESIGNED | Director | 15 Oct 2012 | 31 Dec 2014 | United Kingdom | December 1963 | 8, Devonshire Square, London, EC2M 4PL, United Kingdom |
| ROBINSON, Clive George RESIGNED | Director | 27 Feb 2001 | 11 Jun 2003 | | June 1954 | The Coach House 3 Stewart, Tadworth Park, Tadworth, Surrey, KT20 5TU |
| SHANAGHY, Nathan Patrick RESIGNED | Director | 01 Apr 2018 | 01 May 2025 | United Kingdom | June 1974 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| SMITH, William Blades Berwick RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | | November 1956 | 26 Swanage Road, London, SW18 2DY |
| STAMP, Philip RESIGNED | Director | 01 Mar 2005 | 30 Jan 2009 | | July 1949 | 8 Devonshire Square, London, EC2M 4PL |
| STEPHENS, Michael John Graham RESIGNED | Director | 01 Jan 2000 | 31 Dec 2000 | | April 1942 | Shaynee, 61 The Avenue Cheam, Sutton, Surrey, SM2 7QE |
| STEWART-BROWN, Brian Trevor RESIGNED | Director | 01 Jul 1997 | 21 Jan 2003 | | June 1945 | 10 Ormonde Gate, London, SW3 4EU |
| STOW, Peter Jeremy John RESIGNED | Director | 01 Apr 1998 | 31 Dec 2000 | | September 1947 | Tharston Hall Hall Road, Tharston, Norwich, Norfolk, NR15 2YE |
| TAYLOR, John Maxwell Percy RESIGNED | Director | 01 Jan 2001 | 30 Jun 2005 | | March 1948 | 8 Devonshire Square, London, EC2M 4PL |
| TORRY, Anne Tracey RESIGNED | Director | 28 Dec 2018 | 31 Mar 2024 | United Kingdom | June 1965 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |
| TUNNICLIFFE, Andrew David RESIGNED | Director | 10 Feb 2016 | 26 May 2017 | England | November 1962 | The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom |