Workmen outside the polling station at Shoreditch Town Hall during the UK's EU Referendum Polling Day on June 23rd 2016 in London, United Kingdom. Membership of the European Union has been a topic of debate in the UK since the country joined the EEC, or Common Market in 1973. It will be the second time the British electorate has been asked to vote on the issue of Britain's membership: the first referendum being held in 1975, when continued membership was approved by 67% of voters. The two sides are the  Leave Campaign, commonly referred to as a Brexit, and those of the Remain Campaign who are also known as the In Campaign. (photo by Mike Kemp/In Pictures via Getty Images)
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