Tory MP Peter Bone, one of the proposers of an amendment to the Queen's Speech, has said that MPs who vote against it tonight will effectively be "voting against an EU referendum".
A vote today for the amendment would give the Prime Minister the moral authority to bring in his EU Referendum Bill as a Government measure.
Members of this House should vote for this amendment because it is in the national interest. It is right that after 30 years the British public should have their say on Europe.
Cameron has pledged to back a Conservative MP's EU referendum bill, as Cable labelled the move potentially 'damaging' for the country.
114 Conservative backbenchers have voted in favour of a eurosceptic motion to amend the Queen's Speech in defiance of the Prime Minister.
David Cameron has denied he has buckled under pressure from his backbench MPs over the EU debate.