George Gibson became its General Secretary in 1912, and served in post for the remainder of the union's existence.
It threatened to organise strikes in all the London asylums in support of a 48-hour week.
In 1931, it changed its name to the "Mental Hospital and Institutional Workers Union".
[1] By this stage, it had secured a very high membership amongst mental hospital staff, including the vast majority of mental hospital nurses
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