Eliza Manningham-Buller

Elizabeth Lydia Manningham-Buller, Baroness Manningham-Buller (born 14 July 1948) is a retired British intelligence officer. She worked as a teacher for three years before joining MI5, the British internal Security Service. She led the newly created Irish counter-terrorism section from 1992 and then became director in charge of surveillance and technical operations. She became Director General of MI5 in October 2002 and, in that capacity, led the Security Service's response to the 7 July 2005 London bombings. Following her retirement in April 2007, she became a crossbench life peer in 2008.

She became chair of the Conduct Committee, which is a select committee of the House of Lords, on 19 January 2022. As of 2020, she is listed as #86 in Forbes list of the World's 100 Most Powerful Women. She was appointed Chancellor of the Order of the Garter by King Charles III in June 2024, becoming the first woman to hold the position.