Scottish APD, will never happen, because when Salmond has to actually balance the books with all his promises the perverbial will hit the fan.
He is so far extended on his overdraft he will lose all veto. They cannot raise their own tax from the current taxtion without a large handout from the UK, and do you think the rest of the UK will be happy to subsidise a tax cut north of the border which affects everyone beneath it.
Everything that is a popular headline grabbing tax policy is promised. But as with him it is all hot air. It will never happen.