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Harold Wilson's Labour Party formed a government after winning a majority of four seats at the 1964 general election. Shortly after this by-election, Wilson called a general election for 31 March. Wilson's hope that he would be returned to office with a larger majority had been encouraged by the government's victory at the Kingston upon Hull North by-election. In the end, Wilson's decision was vindicated, as Labour was returned with a larger majority of 96 seats.