In 1973, there were celebrations when Britain joined the European Community. But there were always those against the UK being part of the project. Over the next 45 years, there were debates and clashes, headlines and speeches; everyone speaking just as passionately about membership, regardless of which side they were on. In Brexit: A Love Story? Mark Mardell has talked to the people who were there at those key moments, trawled through the BBC's archives to hear what was said at the time, and painted a picture of how things have changed over time. Was the end, Britain voting to leave the European Union, an inevitability? Email: worldatone@bbc.co.uk. Twitter: @BBCWorldatOne