The vast majority of cameras in London are private installations, rather than something hooked up to some central system. There are the ring of steel cameras,

The vast majority of cameras in London are private installations, rather than something hooked up to some central system. There are the ring of steel cameras, but that area hasn't been widened recently. TFL cameras are possibly linked into some security service, and there's a fair few of them, but they're mainly pointed at roads.