 He was appointed a Member of the Order of the British Empire in 1944.He was appointed an officer of the same order in the New Year Honours of 1947 and a Commander of the Royal Victorian Order on 31 May 1963.From 1961 Banks was chairman of the International Commission on Large Dams and was Consulting Engineer to Queen Elizabeth II for the Balmoral Estate and a member of the Court of the University of Strathclyde.