Date and heading of the rejection?? We need to see the whole documwnt. Please post copies (not transcripts) of documents, only redacting yr name & address and leaving all else in.
The date is critical, as it governs the next stage of the enforcement process.
and post here both sides of the unredacted PCN, a copy of yr challenge, a copit of their rejection (only redact yr name & address from documents - leave all else in),,
any council photos/video, and a GSV link to the location.
You can park on the road against (but not on) a DK with the consent of the house's occupier. It would appear from GSV that then, because of the additional width created by the opening to Benedict Drive, there would be room for traffic to pass your vehicle during the assisted boarding.
And post here copies of all sides of a correspondece to and from the council (only redact yr name & address from documents - leave all else in), copy of the bailiff's letter, and a GSV link to the location.
At the moment we are concentrating on what has gone wrong with the process, rather than the rights and wrongs of the original PCN.