 In 1939 he joined the Ministry of Economic Warfare as diplomatic adviser, taking charge of the foreign relations side of the policy of blockade against Nazi Germany.Ingram was a friend of Edward Joseph Dent, Glyn Philpot, Sir Arthur Colefax and his wife Lady Sibyl Colefax, Alvary Gascoigne, Lord Gladwyn, Lord Greenwood, Lord Killearn and Sir Frederick Whyte.He was killed in May 1941, aged 50, by enemy action whilst fire watching from his home at 56 Curzon Street, Westminster during the German Blitz on London.