What were the key arguments over Brexit in 1975?
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What were the arguments when the UK voted on Europe in 1975?

In 1975, the UK had a referendum over whether to stay in the European Economic Community - the forerunner of today's European Union - which it had joined two years earlier.

Back then the vote also revolved to a large extent around economic issues and political parties were split over the issues. So what were the key arguments?

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