Europe referendum: George Eustice and Baron Liddle
27 May 2012 Last updated at 11:21 BST
There are signs the British people could get their first referendum on the UK's role in Europe for nearly 40 years.
Giles Dilnot spoke to Conservative MP George Eustice and Labour foreign affairs spokesman Baron Liddle as Tory backbenchers call for one and there are reports that Labour is considering the option too.
MORE FROM THE SUNDAY POLITICS
Watch more Sunday Interviews: Chuka Umunna -- Ed Davey -- Eric Pickles -- Ed Balls -- Harriet Harman -- Nick Clegg -- Grant Shapps -- Andrew Lansley -- Ed Balls -- John Cridland -- Iain Duncan Smith -- Alex Salmond -- Liam Fox -- Michael Moore