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Heart has a look at the days industrial action in North Wales
Unions said it would be the biggest day of industrial action for five years, with public sector workers striking against government plans to change their pensions.
David Cameron urged people not to walk out, saying that change has to happen because people are living longer: "what we are proposing is fair, it is fair to taxpayers but it is also fair to the public sector because we want to continue strong public sector pensions.''