John Warden Brooke, 2nd Viscount Brookeborough was aUlster Unionist politician, the son of the Northern Irish UUP leader, who succeeded his father as Stormont MP for Lisnaskea in 1968. He retained that seat until the proroguing of the Northern Ireland Parliament in 1972.

He was a member of a dissident group of Ulster Unionist backbench MPs who campaigned for the removal of Terence O'Neill as Prime Minister. When O'Neill finally resigned in April 1969 his successor, James Chichester-Clark, brought some of this dissident group into his government. Brooke was made Parliamentary Secretary at the Ministry of Commerce (1969-1970). Under Brian Faulkner's premiership, he was government Chief Whip (1971-1972). In the Northern Ireland Assembly (1973-74) and the Convention (1975-76) he represented North Down. Afterwards in the House of Lords he represented the views of the Unionist Party of Northern Ireland (UPNI)