Prime Minister David Cameron, in his New Year message, appealed to Scotland to remain part of Britain.
Scots are to decide in a referendum on September 18 on whether to become an independent sovereign state, ending some 300 years of union with the rest of Britain.
"This year, let the message go out from England, Wales and Northern Ireland to everyone in Scotland we want you to stay - and together we can build an ever stronger United Kingdom for our children and grandchildren," Cameron said.
The government in Edinburgh under First Minister Alex Salmond predicts that devolution will bring economic and social benefits for 5 million Scots.
However, opinion polls consistently shown the majority of Scots do not favour independence.
Cameron said there were signals of an upswing in the British economy in 2014. He said more work to reduce the budget deficit was needed.