 He lost his seat at the 1924 general election to the Conservative Arthur Evans, but won it back at the 1929 general election.When Labour split at the 1931 election over Ramsay MacDonald's formation of a National Government, Henderson was one of the many Labour MPs to lose their seats.Evans was re-elected, and held the seat until the 1945 election, when he lost to future Prime Minister James Callaghan.