Do 59% back Scotland staying in the UK?

In a comment article, Pamela Nash (chief executive of Scotland in Union) claimed that:

This is despite there being consistent evidence that I am representing the majority of people in Scotland; a huge 59 per cent would vote to remain in the UK, according to a new poll.

This article examines this claim, and question wording concerning Scotland’s relationship with the United Kingdom.

‘Should Scotland remain in the United Kingdom…’