So a no parking sign with a difference - a reason. The power of why, if only implied.
Looks like the mini graffiti version might not have been so effective. But it'a big brother seems to be doing the job.
So there's a polite "Please", though a bit shouty in capitals, with some apparent teeth "by order" and in police blue, plus it's quite specific. There's the implied why around access to gas meters, but also potentially some risk to them from parking up the kerb or entry/access to the vehicle. There's probably some other implied incentive here around not wanting to park over a gas supply.....
