[Fradow]

ULEZ and similar scheme are not about vehicle size. They are about Euro-spec of the engine.

There is a very vocal opposition against those: big recent SUVs are compliant, but small old cars are not, which goes against how people perceive their respective emissions.

In general: - any EV or hybrid is OK - petrol cars are OK if they're not too old (depending on Euro rating of the engine, I also have a 22 yo compliant petrol car, though a car from the same year could be non-compliant if the engine has a lower Euro rating) - diesel cars need to be recent (in general equipped with DPF and other emission-control equipment that's become mandatory to pass more recent Euro-specs)