British Prime Minister David Cameron says Scotland will get more autonomy, after Scottish First Minister Alex Salmond accused him and other politicians of tricking Scots out of independence.
Mr Salmond made his allegations after Mr Cameron said new powers promised by Westminster days before the vote should now go in tandem with new powers for England.
This raised the possibility that a new deal for Scotland could be delayed or thwarted by a political row south of the border.
Mr Cameron vowed to give tax-raising powers to the Scottish Parliament "in tandem" with moves to restrict Scottish MPs from voting on English matters.
But No 10 sources insist that "one is not conditional upon the other", the BBC reports.
Labour leader Ed Miliband said he and other leaders must honour their promise to Scottish voters.
Mr Cameron took Labour by surprise on Friday when he announced plans to end the anomaly which allows 59 Scottish MPs to vote on England-only legislation, such as health and education.
He is under pressure from Conservative backbenchers angry at the way he, Ed Miliband and Nick Clegg teamed up to offer more powers to Scotland in the run-up to Thursday's independence referendum.
The pledge was labelled "disgraceful" and "panicky" by former leadership rival David Davis, while ex-Cabinet minister Owen Paterson said MPs had been kept in the dark about the plan.