After her husband's death in office in 1965, she was created a life peer as Baroness Hylton-Foster, of the City of Westminster on 7 December 1965. Despite her prior objections to women politicians, she became an active member of the House of Lords, and for many years served as Convenor of the Crossbench peers. She was appointed a Dame Commander of the Order of the British Empire (DBE) in the 1990 Birthday Honours.
