One of Labour's biggest donors has challenged Ed Miliband to offer the British people an in/out referendum on EU membership "regardless of future events".
Mr Miliband yesterday pledged to offer a vote if there was any transfer of powers from Westminster to Brussels.
But John Mills, the millionaire founder of JML home shopping, said there was "often disagreement over what constitutes a 'transfer of powers'."
"I want to see a Labour government in 2015 and, as the party that trusts the people, I think we should recognise that the growth of the EU's influence over Britain in the past 40 years warrants a referendum regardless of future events."
Ed Miliband effectively ruled out a referendum on Britain's membership of the EU today, as he set out his party's stance on the issue.
Confused by Labour' pledge to have a referendum on Britain's membership of the EU? You are not alone.