The 1951 New Zealand waterfront dispute was the largest and most widespread industrial dispute in New Zealand history. Over the period, up to 20,000 workers went on strike in support of waterfront workers protesting against financial hardships and poor working conditions. Thousands more refused to handle "scab" goods. The dispute was sometimes referred to as the waterfront lockout or waterfront strike. It lasted 151 days, from 13 February[1] to 15 July 1951.[not verified in body] During the lockout, the Watersiders' Union was deregistered and its funds and records were seized, and 26 local watersiders' unions were set up in its place.[2]
In reviewing the biography of Jock Barnes, then-president of the Waterside Workers' Union, reviewer Tony Simpson described the lockout as "a key element in the mythologies of the industrial left in this country".[3]
The Waterside Workers' Union protested by refusing to work overtime from 13 February. The shipping companies in turn refused to hire them unless they agreed to work extra hours. When no agreement could be reached, union members were locked out.