I keep coming back to this one and must admit I am 50/50 at best.
I take as read that the council will reject, whether they will re-offer the discount, as CP says, dunno.
I am looking at chances if it gets to adjudication and simply not sure how it would go.
The sign on the right that is facing traffic is mis-leading.
An adjudicator could easily use that and the minimal intrusion into the zone to cancel the PCN.
But another could just as easily uphold the PCN.
Neither would be wrong in law, how misleading and how minimal are subjective and subject to the whims of the adjudicator.
Your money, your choice...30 notes (net 20 as CP said) or double or nothing gamble.