European Union flag
Media playback is unsupported on your device
Video

European Union EU issue divides party leaders

David Cameron has once again insisted he will hold and in-out referendum on the UK's membership of the EU if he remains prime minister after the 2015 general election.

But the Liberal Democrats, Labour and UKIP all have very different visions for Britain's future.

Iain Watson reports.

Go to next video: Cameron reaffirms referendum vow