Sir Robert "Robin" Chichester-Clark was Member of Parliament for Londonderry in the British House of Commons from 1955 until February 1974, and to date was the last member representing a seat in Northern Ireland to be a British government minister.

James Dawson Chichester-Clark, Baron Moyola, PC, DL was the penultimate Prime Minister of Northern Ireland and eighth leader of the Ulster Unionist Party between 1969 and March 1971. He was Member of the Northern Ireland Parliament for South Londonderry for 12 years, beginning at the by-election to replace his grandmother, Dame Dehra Parker in 1960. He stopped being an MP when the Stormont Parliament was suspended and subsequently abolished with the introduction of Direct Rule by the British Government.