Alan Campbell Don KCVO (3 January 1885 – 3 May 1966) was a trustee of the National Portrait Gallery, editor of the Scottish Episcopal Church's 1929 Scottish Prayer Book,[1] chaplain and secretary to Cosmo Lang, Archbishop of Canterbury, from 1931 to 1941, Chaplain to the Speaker of the House of Commons from 1936 to 1946 and Dean of Westminster from 1946 to 1959.

Born into a manufacturing Dundee family,[2] the son of Robert Bogle Don and Lucy Flora Campbell, he was educated at Rugby and Magdalen College, Oxford.

Deciding the family business was not for him,[3] studied for ordination at Cuddesdon College before becoming a curate in Redcar followed by an incumbency in Yorkshire.

Robert Anderson Jardine, of Darlington, who, against the rules of the Church of England, conducted the wedding of the Duke of Windsor and Wallis Warfield in 1937.

As a Scot, Don felt this theft acutely and was important to the return of the Coronation Stone to Westminster.