I haven’t ploughed my way through the humongous pages of posts on this one, but…
A wee observation…. Whenever komissar Khan talks about ulez, the first thing he mentions is just how much money he’s taken in that month. Regardless of the whys, wherefores etc., or original reasons for the Livingstone inspired congestion charge, ulez is seen as a money spinner… And as for congestion in central London, it‘s not that much improved; especially around Hyde Park corner, Victoria, Westminster, Trafalgar Sq. and Oxford St/ Tottenham Ct. Rd., Bayswater through to Shepherds Bush/White City, Hammersmith and Chiswick and points west. Air quality may/may not have improved as much as he and his supporters claim. If one gets across some of the stats which appear from time to time in various online and print sources there is a lot of contradictory material there; depending on the biases/prejudices of those researchers and their conclusions.
The infrastructure for EV is woefully inadequate and regardless of promises various is likely to be so for a long time; and for the huge numbers of possible EV owners who do not have a driveway, may also be in a tower block… that is unlikely to improve for a very long time. And out in rural areas it will likely be a very long time before they get a decent network of reasonably priced charging points, or grid capacity to support them and those on domestic properties.
The proliferation of npr cameras currently installed in Greater London for ulez will inevitably be transformed into another money spinner - pay per mile - for KK if he‘s still around as mayor (hopefully not…) or his supporters. He promised to observe the views of the various boroughs and abide by them when proposing the expansion, and then gave them the equivalent of two (or is it now a one) finger salute, went ahead regardless.
The technologies which ought to be developed more fully are hydrogen powered vehicles, and also fuel cell systems. Both exist but lack proper funding for wider expansion.