SHADOW Chancellor Ed Balls has urged Scots to vote No in the referendum, citing higher costs on interest rates and pensions, but he struggled to explain his claim that Border posts could be erected at Berwick and Gretna.

A bullish Mr Balls spoke of high set-up costs for a Scottish state, higher interest rates, the lack of a formal currency union, and during his trip to Scotland repeatedly making reference to border controls.

But asked about the lack of border controls between Northern Ireland and the Republic of Ireland he appeared flummoxed, with Labour colleagues Johann Lamont and Anas Sarwar coming to his aid. Mr Balls insisted that the lack of border controls with Ireland was a result of the Republic agreeing to maintain similar immigration rules to the UK, while Alex Salmond was openly promoting a different policy.

He accused the First Minister of trying to con Scotland into voting for independence by refusing to reveal his currency plans and transition costs. The Shadow Chancellor visited Edinburgh to "convince the people of Scotland to vote No" and outline "the facts" on currency, taxes and interest rates which mean Scotland "would be much, much worse off" if it was independent.

Mr Balls said: "I don't have a vote in this independence referendum but I really care about the result, as do people across the UK.

"We want Scotland to stay in the union. I want not just Labour voters but all voters to vote No in the referendum, because that's the way to make sure that we don't have high interest rates in Scotland, that we don't have our pensions system broken up.

"It's the way that we can have more jobs, more investment, we can continue to work together. I think it's the best way forward and I want to help convince the people of Scotland to vote No.

He added: "Let's have an open debate about what the costs are. We have set out what the costs are, something that Alex Salmond has absolutely, totally failed to do.

"He won't tell us what his currency plan is. Scotland will not be able to stay part of our currency union. So what is Alex Salmond's plan?"