UK Chancellor George Osborne is likely to rule out a formal currency union with an independent Scotland, government sources have told the BBC according to Harris & Co accountants Northampton
It comes after the prime minister said Mr Osborne will set out details of the coalition"s position later this week.
The Scottish government has said it wants to retain the pound if there is a "Yes" vote in referendum.
A spokesman for Scottish Finance Secretary John Swinney said Westminster was trying to "bully Scotland".
The Scottish government has said a currency union is the "sensible option".
According to BBC political correspondent Tim Reid, if the Treasury was to formally rule out a currency union it would pile huge pressure on Scottish ministers over which currency an independent Scotland would use, ahead of the referendum in September.
On 18 September, voters in Scotland will be asked the yes/no question: "Should Scotland be an independent country?"