Quite rightly, prerogative powers have been reduced over time, because they go back to the period before the Glorious Revolution of 1688 and are, by definition, rather anomalous. There are some areas in which those powers are easy to replace by statute, which has been going on. The powers exercised by prerogative are subject to much greater constraint by statute now. For example, I refer the right hon. Lady to the Human Rights Act 1998, which has made considerable statutory inroads into the previous exercise of discretion by Ministers. The situation happens to be more difficult in other areas. It is important to put the power of this place into proper perspective. In a recently published study, a former parliamentary clerk has pointed out that the powers exercised quite properly by this House over Governments are now far more extensive than they were, for example, 40 or 50 years ago.