Calman tax powers are a milestone to Scottish independence, not a millstone for Holyrood.

If there was a twinkle in the eye of Alex Salmond last week, as he scoffed at the new tax powers being offered in the Scotland Bill , it may be because, under the table, he was pinching himself.   I’m pinching myself.  I still can’t quite believe that a Tory-led coalition government in London is introducing the widest and deepest extension of Scottish constitutional powers since devolution, even if they are flawed.