@Hossenfeffer And finally, Londoners who now need a <15 year old petrol car, to replace their 16 year old one, can have I gather £2000 toward it as scrappage, funded by the people who get cleaner air out of it, their wider neighbours.

Occasional visitors are asked not to be mucky, but if they insist, can pay.
Frequent visitors - well yes, action indicated.