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In page Co-operative Party:

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At first the party put forward its own candidates. The first was H. J. May, later Secretary of the International Co-operative Alliance, who was unsuccessful at the January 1918 Prestwich by-election. Ten then stood in the 1918 general election.[2] One candidate met with success, Alfred Waterson, who became a Member of Parliament for the Kettering seat. Waterson took the Labour whip in Parliament. In 1919, 151 Co-operative Party councillors were elected at local level. Waterson retired from Parliament in 1922, but four new Co-operative MPs were elected that same year, including A.V. Alexander, all of whom took the Labour whip. Six were elected in 1923 and five in 1924.