Robert Vansittart, 1st Baron Vansittart

Robert Gilbert Vansittart, 1st Baron Vansittart, (25 June 1881 – 14 February 1957), known as Sir Robert Vansittart between 1929 and 1941, was a senior British diplomat in the period before and during the Second World War. He was Principal Private Secretary to the Prime Minister from 1928 to 1930 and Permanent Under-Secretary at the Foreign Office from 1930 to 1938 and later served as Chief Diplomatic Adviser to the British Government.

Source: Wikipedia — Robert Vansittart, 1st Baron Vansittart (CC BY-SA 4.0)