 He returned to the House of Commons at another by-election, in 1939 as MP for Kennington.Wilmot was re-elected to Parliament at the 1945 election for the Deptford constituency, and served in Clement Attlee's post-war government as Minister of Aircraft Production from 1945 to 1946, when that office was abolished, and as Minister of Supply from 1945 to 1947.He was admitted to the Privy Council in 1945.