Over 50 Groups Begin Brexit Campaign in Historic Vote on EU
![Over 50 Groups Begin Brexit Campaign in Historic Vote on EU](http://cdn4.img.sputniknews.com/images/103807/00/1038070040.jpg)
More than 50 groups have registered to campaign in the In-Out referendum on Britain's membership of the European Union, in what is the most important - and potentially politically explosive - referendum the UK has held in more than 40 years.