Looks bang to rights and they can serve these by post. In London most major bus stops and school zig-zags are covered by fixed CCTV in the same way, as are red routes.
I would say though that these drive-bys can't show for sure a car wasn't in motion but if it looks stopped that's probably enough for the tribunal.
See is anyone else has anything.

Thanks for helping looking into this even though I'm gonna have to cough up, appreciate it. There's no way I could argue we were moving - my wife pulled in there as we know that bay is OK (just didnt know daytime only) and to let me out somewhere safe as I've recently had surgery on both hands.
The thing I mentioned says this "Why the Penalty Charge Notice has been served by post – for example, due to CCTV evidence, because a driver prevented an officer from giving a ticket, or because the driver sped away before the ticket could be stuck to their car.". So although they are allowed to serve by post like you said, do they have to give the reason?