 At the 1945 general election he was elected to succeed Herbert Morrison as MP for Hackney South, and held the seat until its abolition in 1955.From 1950 to 1951, Butler was Parliamentary Private Secretary (PPS) to the Civil Lord of the Admiralty, Walter "Stoker" Edwards.the Hackney South constituency was abolished at the 1955 general election, when Butler was elected as MP for the new constituency of Hackney Central.