It's hard to find evidence for something which has yet to transpire. There are plenty of economics experts out there who have already made this kind of assertion. Even the London based Financial Times has clearly stated that a currency union would be in the best interests of rUK. In fact, they say it would be more in the interest of rUK than it would be for iScotland.
http://www.ft.com/cms/s/0/8bf832a8-b984-11e3-b74f-00144feabdc0.html#axzz2xj6OFbcr
However, if you need a link to someones thinking, rather than using your own common sense, there is probably little point.
Apart from transaction costs if there is no sharing of the pound, rUK ends up with another £130bn of debt, a 10% smaller economy from which to service it (never mind repay it), double the already chronic trade deficit and a massive (oil) hole in its reserves. Perhaps you should be telling me how you think a currency, even a relatively strong one, will survive that sort of onslaught without batting an eyelid? If a currency has any kind of trouble, interest rates go up - simples!