Le Marchant unsuccessfully contested Vauxhall, a London safe seat held by the Labour Party's George Strauss since its formation in 1950, at the 1966 general election.
Le Marchant received note in Thatcher's memoirs as "famous for his intake of champagne", 6 foot and 6 inches tall, and "could be heard booming out the result" when the then Labour government lost a motion of no confidence by one vote, causing the 1979 general election.
Le Marchant retired from the House of Commons at the 1983 general election, and died at the age of 55 in 1986 on the Isle of Wight.
In 1955 he married Lucinda Gaye Leveson-Gower, daughter of Brigadier General Hugh Nugent Leveson-Gower, RA and his first wife, Avril Joy Mullens (later fourth wife of Ernest Aldrich Simpson, himself the second husband of Wallis, Duchess of Windsor, whose love affair with King Edward VIII led to the 1936 abdication crisis).
This article about a Conservative Member of the Parliament of the United Kingdom representing an English constituency and born in the 1930s is a stub.