Scotland Bill

My Lords, my noble friend Lord Forsyth is suggesting that we need another referendum on the use of tax powers. It is my memory that, 12 years ago, the second question in the referendum was along the lines of, ““This Parliament should/should not have tax-varying powers””. Do tax-varying powers not strike a lot wider than the Scottish variable rate, which was enacted? Consent has already been given for any form of variation in existing taxes.