Only about 2 of them will record anything resembling a usable image - the rest are either broken, potato quality, pointing at nothing, or recording to media that’s so fucked that it’s highly unlikely to capture anything useful.
Not to mention the vast majority of them are privately owned and require a shit tonne of paperwork for the cops to access them, so they don’t bother unless it’s a murder case.
Nonetheless the coverage was enough for highly motivated law enforcement agencies to reconstruct almost every step of the paths taken by the Russian assassins, sorry, “sports nutritionists”, when they paid a visit to the UK to nourish a certain enemy of Russia with Novichok.
The UK used to be a surveillance outlier, but sadly other places have caught up in the meantime, including the US.