Scotland's independence battle is a tough one to call. The Yes side has James Bond, but the No campaign has Harry Potter.

Former 007 Sean Connery has long been a vocal Scottish nationalist - from his home in the Bahamas. Earlier this year, he backed independence and said the "core democratic value that the people of Scotland are the best guardians of their own future".

In the other corner stands J.K. Rowling, Edinburgh-based creator of the boy wizard. When she said independence might be "a historically bad mistake" - and backed it up with a million-pound ($1.6 million) donation to the No campaign - it sent a Dementor-like chill through the Yes camp.