"More than 370 cars were burned overnight, down from 502 the previous night. A further 212 people were arrested."
People are probably just protecting their cars better.
Could it be they are finding out their insurance does not cover riot damage?
I don't know, but would guess the insurance companies don't want people to use the cover of a riot to torch their own cars.
A while back, I was reading that cars with Islamic stickers would not be touched. The Muslims are engaged in ethnic cleansing, convincing any remaining non-Muslims in their enclaves that it would be a good idea to move. Torching the transport of non-Muslims is a pretty convincing motivator that it's time to leave
After the infidels are gone, attention will shift to those deemed insufficiently supportive of radical Islam