I am grateful to my right hon. Friend for his intervention. I was about to go on to say that two important principles have been acknowledged. First, the Assembly is more mature. That is reflected in the legislation we are passing to enable the Assembly to reach out and respond further to Welsh needs.
Secondly, when my right hon. Friend was Secretary of State for Wales, he established the principle of devolving significant tax-varying powers without a referendum. In the 2014 Act, the devolution of stamp duty land tax and the aggregates levy, in addition to powers over council tax and the subsequent full devolution of business rates to Wales, account for a broad income of £2.5 billion. The Welsh rate of income tax, which we propose to devolve is—at about £2 billion—significantly less than that. This important principle has been accepted positively by the Welsh public and by civic society. That stands firm and is a backstop to clause 16.