For all the CCTV in London I've been mugged twice and nothing was captured on CCTV nor were the police all that interested in doing anything about it. As an outsider living here I think the UK has huge social problems that are neglected in favour of retaining classism. America has the same problems but at least it's more "ah, what can ya do about it huh" rather than "we are a perfect polite society British values bla bla".
You need political will for this and for enforcement to take it seriously, since the technology to do so is almost trivial nowadays.