Cleaning up London’s toxic air

How much are you personally prepared to pay for it?

Or is it simply the usual "It's a great idea so long as it inconveniences other people"? A Cleaner / safer environment isn't going to be acheived simply by slapping a tax on people,
without a lot of collateral improvements. One might start with adequate public transport, proper road design, 'sharable' autonomous vehicles ,rationalised distribution system, all of which would reduce both congestion and pollution. Safety of course is an entirely different problem.

without a lot of

Have you considered that the older cars don't need to be replaced by new cars? You will find that the 'Green Lobby' actually want people to not use cars at all. Many people in London are in the habit of owning cars but actually don't need them. We have excellent public transport options in London, many cars are used / owned out of habit rather than because of practical reasons.
And when a car is genuinely required - such as carrying shopping or heavy loads - car clubs come into their own. Drive Now offer excellent options.

It's all very well saying you can live without a car if you never need to travel outside London but many people (myself included) have a car because most of my driving is done outside London to visit friends / family and go to events that may be difficult or impossible to reach by public transport. In central London I would say over 99% of my travel is by public transport, on foot or by bike but if I'm visiting friends who live in small country villages where there is no train station and only one bus per day from the nearest town it simply isn't practical to get there without a car. Public transport outside London is an order of magnitude less convenient than in London and it is not under the control of the Mayor so no matter how much people may want to reduce their car use they simply can't. Any pollution charging scheme has to be pragmatic, reasonable and fair enough to cater for a range of situations and should not penalise unduly those people who have a car in central London because they have a need to go to places outside London that they cannot get to without driving. This is why the Mayor has to look again at the daily flat charge idea because it penalises exactly those people who in the grand scheme of things do not drive much in London at all. As I've said the charge should be based on mileage done and all vehicles should pay it except genuinely zero emissions vehicles so that those who genuinely need a car are not priced out of visiting their friends and relatives out of London if they cannot drive or afford to replace their older car.

Heathrow adds a massive burden of air pollution to the locality so i absolutley sympathise with you. However to function as an airport it would not be possible to extend the zone to it. All kinds of vehicles are needed for the frieght that comes in that way and there would be such a massive lobby by i dustry it would never get passed. Certainly there shoul not be another runway there! I don't know if there are other ways that the pollution in the area can be addressed. It does need looking at.