IMO, I suspect you didn't lead them by the nose.
I suggest you write back.
PCN *******
I refer to the above, my initial representations and your response dated *** rejecting those representations.
I feel I should write to you again because, although I thought that the matter was clear-cut, the authority have either not understood the law or misapplied it, either of which requires me to write to you again.
To reprise my representations, I parked at the location which is situated on the same side of the carriageway and approximately 25m ahead of a footway parking sign which carries the following meaning in law:
Vehicles may be parked partially on the verge or footway
The Regs provide that 'An arrow pointing to the left or to the right may be added'[indicating that it applies in either direction]. The absence of arrows carries the meaning that parking with two wheels(whether nearside or offside) is permitted until terminated by the sign at Item 16 in the Part 2 Sign Table of Schedule 7 to the Traffic Signs Regulations and General Directions 2016 -https://www.legislation.gov.uk/uksi/2016/362/schedule/7/made
The objective evidence is clear in that are no arrows on the sign, neither is its effect terminated between the sign and my car.
A motorist is entitled to act upon this sign i.e it is not mandatory upon a motorist. However, an enforcement authority has no lawful power to disregard it, which in its rejection of my initial representations it purported to do. This issue has nothing to do with the Highway Code but relies upon the council having exercised its power under s15 Greater London etc. Act 1974 to permit footway parking anywhere within the scope of the permissive signs which the council itself erected. If no such relief has been given then the council should consider its position on this matter, not penalise motorists acting lawfully.
I suggest that further consideration should be given to your decision.
(for info, footway parking permission may co-exist with any other restriction but has no effect upon it e.g. double yellow lines etc. If a motorist parks on DYL, whether this be on or off or straddling the carriageway, then unless an exemption applies- which coincidentally it did here(but is not germane to the central issue) - then they are in contravention of that restriction, footway parking has no part to play).