The Treasury and Scottish Government have clashed over whether Scotland should keep the pound if the country votes for independence.
Chancellor George Osborne said: "I want the best for Scotland and for all our United Kingdom. We're better together."
Scottish Finance Secretary John Swinney said Scotland could walk away from its share of the UK's debts if the Westminster government refuses to come to "a rational and considered agreement".
Debi Edward reports:
More top news
The Tory party's "anti-immigration rhetoric" could cost MPs key marginal seats in the forthcoming general election, a new report says.
Two pilots have broken the world distance record for a flight in a helium balloon after soaring over the Pacific Ocean.
The number of terminal cancer patients who die in hospital rather than at home is placing "unnecessary strain" on the NHS, a report says.