I am not entirely sure how that arithmetic is worked out, but I know that the departments are in constant dialogue with each other to try to ensure that the best case is made for improving air quality and for tackling the health problems that go with poor air quality.
My Lords, I declare my interests as set out in the register. Does my noble friend agree that we need more internet-connected air quality meters in London in order to tell people quite how bad the air is?
It is all very well telling people how bad the air is, but you then need to tackle the problem itself. All these methods of communication help if they alert people to when it is safe to go out or when they should stay at home and not drive their cars. I think that that may well be one method to be pursued.