Nicholas Ridley, Baron Ridley of Liddesdale, PC (17 February 1929 – 4 March 1993), was a British Conservative Party politician and government minister. As President of the Selsdon Group, a free-market lobby within the Conservative Party, he was closely aligned with Margaret Thatcher, and became one of her Ministers of State at the Foreign and Commonwealth Office in 1979. Responsible for the Falkland Islands, he tried to resolve the long-running sovereignty issue with Argentina, which detected Britain's reluctance to defend the territory, and later invaded it.