Speaker Denison's rule is a constitutional convention established by John Evelyn Denison, who was Speaker of the British House of Commons from 1857 to 1872, regarding how the Speaker decides on their casting vote in the event of a tie in the number of votes cast in a division.

Betty Boothroyd, Baroness Boothroyd, was a British politician who served as a member of Parliament (MP) for West Bromwich and West Bromwich West from 1973 to 2000. A member of the Labour Party, she served as Speaker of the House of Commons from 1992 to 2000. She was previously a Deputy Speaker from 1987 to 1992. She was the first and to date only woman to serve as Speaker. Boothroyd later sat in the House of Lords as, in accordance with tradition, a crossbench peer.