Some thoughts.
As per Incandescent,
When you drove down the road, you saw a sign at the entrance to Schuster Road which advised it was permits only on that street so assumed that Kent Road West had no restriction.
Perfectly reasonable, but I'd put it stronger.
I refer the authority to their evidence photo no.5. This clearly shows the reflection of a a Permit Parking Area gateway sign sited at the junction of Kent Road West and Schuster Road. I saw this sign and therefore did not enter Schuster but instead parked outside that permit area, as can be seen in your photo and assumed that where I parked was not restricted.
The PCN alleges that I was actually parked in the same 'Permit Parking Area' and indeed after I found the PCN I discovered the same signs at the junction of *** and Kent Road West, signs which I had not seen when turning left from ****. Not only did I see the sign on the nearside(the one on the offside is not readable other than if a motorist turns right from ***), I could see why I missed it when I entered the road: it was obscured by the tree in the garden of no. ***, a tree whose lower branches in full leaf must always obscure this sign. I therefore feel that I am probably not alone in being caught by the council's failure to make this sign readable 365 and 24/7.
In any event, either this pair of signs or those at the junction of Schuster are not lawful i.e. they are not placed to indicate the effect of an Order. This point cannot be argued by the council because it is simply a matter of correct legal interpretation.
A Permit Parking Area is defined by Schedule 1 to the Traffic Signs etc. Regulations as:
an area—
(a)
into which each entrance for vehicular traffic has been indicated by the sign provided for at item 5 of the sign table in Part 3 of Schedule 5
This Instrument consolidates, with substantial amendments, the Zebra, Pelican and Puffin Pedestrian Crossings Regulations and General Directions 1997, the Traffic Signs (Temporary Obstructions) Reg...
I would draw your attention to the word 'entrance'. The council may not as a matter of law place such signs other than at the 'entrance' to a PPA. So, which is the entrance, Kent Road West or Schuster? It cannot be both, and yet both are present and the Schuster ones are clear at all times. Please do not suggest in any reply that these signs may be used as 'repeater' signs because they may not. If the council wishes to place such signs then then the prescribed form is at Item 4 of Part 4 of Schedule 4 to the regulations.
Assuming that there is a PPA in the vicinity, then it has not been signed as required. Therefore the council has not met its duty under the Local Authorities Traffic Order regulations and the PCN must be cancelled.