Free Traffic Legal Advice

I have receieved a PCN for stopping in a yellow box junction and missed the 14 day deadline due to the PCN only received last week despite notice date being 24/10/25 and me misunderstanding hwo much time I had to receive the discount.

The 3 pages of the PCN are uploaded to google photos here:

The council images and video are viewable here: https://brent.tarantoportal.com/

PCN number: BT269441166
VRML LL74AYX

Streetview of the location:

I believe the yellow box is too big and I didn't obstruct any other motorists however this may not be correct as there was 1 motorist trying to turn right who had to wait so any expert guidance appreciated. I don't know how to construct the representation so would appreciate any assistance.

I hope i've covered all the required info but please let me know if I need to add any detail.

EDITTED to say motorist who had to wait was turning right

I agree re the size. Please see the first link in my profile and digest it. We can then file a solid representation. PCN has valdity problems.