Mr Salmond repeatedly stresses that his aim is to repeal the Parliamentary Union of 1707, not the regal Union of 1603 when the Scottish king assumed the English throne as well.

BBC: Royal role in independence debate

Amendments to some of Britain's key constitutional documents, including the Bill of Rights and Coronation Oath Act of 1688, the 1701 Act of Settlement and the 1707 Act of Union between Scotland and England, will be necessary to enact the bill.

BBC: Royal succession bill published

Scotland got the 1707 Act of Union for its pains.

FORBES: When Scotland Lost Its Mind

There is no precise date on offer - but those with a sense of history in the SNP (and there are one or two) are recalling that the old pre-Union Scottish Parliament was adjourned on the 25th of March 1707 - as Winnie Ewing famously recalled when she opened the new devolved version in 1999.

BBC: Giving in to temptation