The Leader of the House William Hague has thrown down the gauntlet to Labour over English devolution.
After a meeting at Chequers between the Prime Minister and backbench MPs, it emerged that the Tories plan to press ahead with what were said to be "robust proposals" to give English MPs control over English laws.
"If other parties make it impossible to deal with these issues in tandem, " Mr Hague warned.
Ed Miliband has attacked David Cameron's proposal for 'English votes for English laws', saying he is trying to "drive our country apart".
The Prime Minister has called on the Labour leader to make clear whether he would support measures to stop Scottish MPs voting on matters that only affect people in England.
Speaking to the BBC's Andrew Marr Show, Mr Miliband said he was open to "greater scrutiny" of English-only legislation, but insisted it could not be hurried.
"I am open to the idea of greater scrutiny of legislation by English MPs...but we can't do it in a back of the envelop, fag packet way," he said.
"We've spent two years trying to keep our country together, let's have a proper constitutional convention, let's look at these issues, but let's not do this, let's not drive our country apart because David Cameron thinks it's an opportunity to do it, let's keep our country together," Mr Miliband added.
If last week was about "country before party" this week it's a very different story.
Cameron may have wrong-footed Labour, but there may also be serious rumblings from his own backbenchers, if he wavers on England's future.
Following the promise of further powers for Scotland, David Cameron is now talking about a new deal for the other home nations.