The Chancellor has warned that an independent Scotland would risk losing the pound.
Speaking in Glasgow George Osborne cast doubt on a euro-style currency zone, but the Scottish government disagree and has accused the Chancellor of scaremongering.
ITV News Political Correspondent Libby Wiener reports:
More top news
The star celebrated his 70th birthday with his family before attending a celebrity-filled bash held in his honour.
Douglas Carswell told ITV's Peston On Sunday he wanted to "support" the government as a "critical friend" but refused to rule out a return.
Several of victims had life-threatening injuries, police said.