Re: The horse has bolted
Since they claim to have no knowledge!!!!!
Phone highways and ask them to remove unauthorised Camera's as you beleive they are being used by peodophiles to monitor children, give them 7 days to comply or you'll report to the peoples champion "The Sun" or other sleazepaper.
Mention the ICO https://ico.org.uk/ and ask who you need to consult about information requests about CCTV coverage of an event you where involved in, like Damage to your vehicle whilst you where present since its on their equipment.
Ask if you can put up your own unauthorised Camera as well, whats the penalty, would they threaten to immediately remove for instance.
Also if you climb up (a ladder) and remove the illegal camera is that OK, can you have it since its not theirs and obviously illegally abandoned (although presumable fixed illegally to their lamp post) and as long as you don't damage the lamppost obviously.
Point out their isn't a notice of CCTV and a data controller identification so if its theirs i THINK they are in breach of something or other.
Anon since this is me having fun and not legal advice and i'm too scared of the MAN to do any of these things (I definately wouldn't paintball the camera either)