Analysis has been prepared by Treasury civil servants and their analysis shows that the current arrangements of a full monetary, fiscal, political union bring economic benefits to all parts of the United Kingdom.
Breaking up that union would represent a fundamental change and confront an independent Scottish state with difficult choices about what to put in its place.
More top news
Leicester City have sacked manager Claudio Ranieri less than nine months after he guided them to a historic Premier League title
Around 40 people were in the sports hall at Southwood Middle School in Milton Keynes when the 8ft by 5ft ceiling caved in.
Shaun Walmsley, 28, is on the run after two armed men helped him escape during an escorted hospital visit.