There is one possibility here.
The offence wording of "Stop a Vehicle Within Pelican Crossing Limits" corresponds to the ZP97001 offence code. This then continues:
Contrary to regulation 18 of the Zebra, Pelican and Puffin Pedestrian Crossings Regulations 1997, section 25(5) of the Road Traffic Regulation Act 1984 and Schedule 2 of the Road Traffic Offenders Act 1988.
Now... The Zebra, Pelican and Puffin Pedestrian Crossings Regulations 1997 have been repealed, so they cannot prosecute you under that act. Legislation.gov likes to pretend it hasn't, but it has.
They should have given you a CoFP you with "Failing to Comply with a S36 Traffic Sign (endorsable) (manned equipment)" instead.
So if you are feeling lucky, you can ignore the CoFP, wait for the police to go to court, and hope they attempt to charge you under the incorrect act.