Whoever posts last is best

[robbo]

Those "perfectly good cars" still produce pollution which accumulates in the central areas of London.

ULEZ is nothing but a money generator for an ineffective inefficient mayor. If he was really bothered about pollution he’d ban all non compliant vehicles, but for £12.50 you can fill your boots. I’ve friends who are understandably attached to long owned non compliant cars, who just shrug and pay the money. Personally I won’t prop up the Kahn regime, so got a compliant car.
Anyone who’s in to their cars, no doubt owns something fairly recent, so ULEZ has no impact. Others need a car, and run something that’s legal and safe. A nurse, fireman, policeman or in fact anyone who has to work nightshifts, suddenly has had to pay £25 just to go to work for one shift. When I was in hospital in Chichester the staff didn’t believe what I was telling them regarding the charges. For some it would make going to work, too expensive.
I just googled “prevailing wind over London”, and apparently it’s south westerly, so at a guess I’d say the air was changed daily with that from the Atlantic. Maybe a ULEZ scheme would better serve Colchester,Cambridge and Norwich, which seems to be in the path of London’s exhaust.