3. Born in London, Donald Duart Maclean was the son of Sir Donald Maclean and Gwendolen Margaret Devitt. His father was chosen as chairman of the rump of the 23 independent MPs who backed Herbert Asquith in the Liberal Party in the House of Commons while the bulk of the Liberal MPs had followed David Lloyd-George into the Coalition Liberal party in the November 1918 election. As the Labour Party had no leader and Sinn Féin did not attend, he became titular Leader of the Opposition. Maclean's parents had houses in London as well as in the Scottish Borders, where his father represented Peebles and Southern Midlothian, but the family lived mostly in and around London. He grew up in a very political household, in which world affairs were constantly discussed. In 1931 his father entered the Coalition Cabinet as President of the Board of Education. Maclean's education began as a boarder at St Ronan's School, Worthing. At the age of 13, he was sent to Gresham's School in Norfolk, where he remained from 1926 until 1931, when he was 18. At Gresham's, some of his contemporaries were Lord Simon of Glaisdale, James Klugmann Roger Simon, Benjamin Britten and the scientist Sir Alan Lloyd Hodgkin. Gresham's was then looked on as both liberal and progressive. It had already produced Tom Wintringham (1898–1949) a Marxist military historian, journalist, and author. James Klugmann and Roger Simon both went with Maclean to Cambridge and joined the Communist Party at around the same time.