The practicalities of Scottish independence

A Union flag, the national flag of the United Kingdom, top, and a St. Andrew's or Saltire flag, the national flag of Scotland, fly from a flagpole above the HM Revenue and Customs building in London, U.K., on Wednesday, Sept. 10, 2014. The pound dropped to the weakest since November against the dollar yesterday after polls showed the pro-independence campaign in Scotland had wiped out the No camp's long-standing advantage, leaving the result too close to call. Photographer: Simon Dawson/Bloomberg