My Lords, I thank the noble Lord for his questions. On his last question, I can say that we believe the legislative framework exists to deal with these matters, and therefore a separate clean air Act is not necessary because they can already be dealt with.
On the issues at hand, we have been advised that there are very strong requirements vis-à-vis purdah. However, I say to the noble Lord and indeed to all noble Lords that we will ensure that this short delay in the timetable will not result in a delay in the implementation of the plan. It is precisely to deal with the purdah issue, relating to both local government and the general election, that we have given the dates by which we want to publish this report. Obviously it is in everyone’s interests that we publish, and we want to work in partnership. That is why we are working with the devolved Administrations and the Mayor of London, and indeed we are working with many cities that have this acute problem which we need to address.