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Brexit campaign

Britain Stronger in Europe campaigners, London, June 2016Referendum posters for both the Leave and Remain votes in Pimlico, London Campaigning in the United Kingdom European Union membership referendum began unofficially on 20 February 2016 when Prime Minister David Cameron formally announced under the terms of the European Union Referendum Act 2015 that a referendum would be held on the issue of the United Kingdom's membership of the European Union.

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