What the Lib Dems said on EU referendum in manifesto
Deputy Prime Minister Nick Clegg said today that there should be a referendum on Europe if there is a "significant change" between the UK and Europe's relationship.
Here is an extract from the Liberal Democrats 2010 manifesto on Europe:
The European Union has evolved significantly since the last public vote on membership over thirty years ago. Liberal Democrats therefore remain committed to an in/out referendum the next time a British government signs up for a fundamental change in the relationship between the UK and the EU.