In or out-how to you intend to vote on our EU membership? In or out-how to you intend to vote on our EU membership? Britain joined the EEC in 1973. Under the Labour Prime Minister, Harold Wilson, there was a UK referendum on continued membership of the EEC in 1975. Then, the result was a resounding ‘Yes’ by 67.2% to 32.8% to stay in Europe. 41 years later Prime Minister David Cameron invites us again to vote whether we wish to continue being members of the EU. How to you intend to vote on 23rd June 2016, have you decided yet?