Of course, I understand that the Member takes a different view on the part that taxation can best play in the way that we conduct our affairs. He is right to say that a vacant land tax was partly chosen because I didn't want to send an idea around the circuit that would overwhelm what is a very nascent process, and some of the other ideas we talked about are much more significant ideas, but I felt that we might not get the lessons from the new process if we found ourselves dealing with ideas that are themselves of considerably more significance.

The Oliver Letwin review: I'm not sure how much we will be able to draw from it for Wales, but I cited it because it has its genesis in the figures that Nick Ramsay helpfully quoted earlier and shows that the issue of permissions that have been granted and the work that the public has done in order to get land into that position isn't always matched by the use that those permissions are then put to, and it's not a Welsh-only issue.

Of course, Neil Hamilton is right to say that more evidence will be needed, and I tried to indicate in my statement that my aim is to use the period between now and when any power might be devolved to Wales to begin to build up that evidence base so that by the time we come to have a consultation and to look as to how those powers might be used we will have a much richer body of evidence ready to share with others to see how this might be taken forward.