Conservative MPs call for UK veto over EU laws
12 January 2014 Last updated at 13:18 GMT
More than 90 Conservative MPs have written to David Cameron urging him to give Parliament a national veto over current and future EU laws.
They urged him to hand the Commons the ability to block new EU legislation and repeal existing measures that threaten Britain's "national interests".
Downing Street said it was working on a new settlement with Brussels.
But Deputy Prime Minister Nick Clegg said Conservatives must "make up their minds" on whether to stay in the EU.
And Conservative Justice Secretary Chris Grayling suggested it would not be "viable" to allow any "one (national) parliament to veto European legislation".