No, that's not my point. Rather, the issue for me is that IMO you were clearly in contravention of one of two mutually exclusive statutory prohibitions i.e. if you were >50cm then this is a contravention in itself, and if you weren't then this is being 'parked adjacent to'.
IMO, you were >50cm therefore you would be fortunate in that the CEO's grounds won't fly.
I highlighted the relevant part of the statutory* prohibition.
cp's reasoning is predicated on your account and that there aren't photos of the PCN having been affixed to the car. The rules regarding service are:
a)fixing a penalty charge notice to the vehicle, or
(b)giving a penalty charge notice to the person appearing to the civil enforcement officer to be in charge of the vehicle.
We haven't seen the CEO's notes, but if they do not support (b)(which wouldn't need photos) then there is no reason why the procedural grounds should not succeed. My argument, if accepted by an adjudicator, doesn't rely upon a PCN being served anyway.
But even if you were to succeed on the narrow point of procedure in this case, IMO you were in contravention of one of two statutory prohibitions and subject to the yellow line waiting restriction if this was in effect at the time.
In short, don't park there because for any competent CEO this would be open house.
*- being statutory it doesn't require signs nor an understanding of SEAs on the part of the motorist.