Irving was also a book illustrator, producing artwork for Richard Hakluyt's Voyages & Discoveries of the English (1926) and John Masefield's Philip the King (1927).

British Air Forces in France to be responsible for writing official communiqués and persuading accredited war correspondents to abide by the principle of censorship accepted by their editors.

After the surrender of France he returned to the Air Ministry convinced that the system of local defence could have brought the German armoured thrust to a halt.

12 Corps., then sparsely equipped to repel a German invasion, to help Peter Fleming to recruit and train an underground force of saboteurs to harass the enemy if a bridgehead was established in Kent and Sussex.

After the War he was invited by J. Arthur Rank to produce and design the film adaptation of Sheridan Le Fanu's Uncle Silas (1947).