Antony Claud Frederick Lambton, also known as Lord Lambton, was a British aristocrat who served as a Conservative Member of Parliament from 1951 to 1973. Styled as Viscount Lambton from 1941 to 1970, he became the 6th Earl of Durham in February 1970 but disclaimed the title soon after. As a result of a sex scandal in 1973, he resigned from Parliament and ministerial office. He was a cousin of Alec Douglas-Home, who was Prime Minister for a year from 1963 to 1964.

Chester-le-Street was a county constituency centred on the town of Chester-le-Street in County Durham. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom from 1885 to 1983.