The fixed cameras on the A3 have been gradually being replaced with digital ones, probably what they’re doing at Hook. I think there’s only the northbound near New Malden Tesco still left on my run in (Hook-Wandsworth).
There are some sort of cameras on the A3 that have been going up over the last year in various spots, not sure what they are though. I thought maybe low emission zone but it seems strange that they’d be on the southbound side.