Scottish independence: Will there be a 'Queen of Scots'?

The Queen has said she hopes "people will think very carefully about the future" ahead of the Scottish independence referendum.

She made the comment to a member of the public outside the church at Crathie on Sunday.

But what resonance does the title of Queen of Scots have with the current monarchy in light of the independence debate?

Royal historian Kate Williams explains what would happen if Scotland votes for independence.