Quote Originally Posted by Mark
They want to keep the pound for the same reason EU countries wanted to adopt the Euro, as it makes trade between the two countries much easier. Having to change currency on crossing the border would be a major headache, that and given that the currency can vary in price with respect to each other it can mean that, for example if you're a manufacturing company based in Scotland and so want to pay your workforce in Scottish pounds, but your main market is in England so the money you get for your goods will vary. Better to have this fixed.
Currency Risk always a problem for trans-nationals but with electronic banking, funds can be settled immediately. Besides which, this issue already exists when Scottish manufacturers deal with Europe, or China, or the United States, or Japan or... (ad nauseum).

Again, you could always set up hedge funds to migigate currency risk, which major firms already do.