This looks like the location:-
Find local businesses, view maps and get driving directions in Google Maps.
Problem is that GSV is out-of-date here, latest view being September 2022, nearly 4 years ago, so plenty of time for the council to put in a School Streets restriction. These are all over London and normally restrict the street at school entry and exit times, so a morning and an afternoon closure. Your PCN time of 15.34 puts it right in the middle of the normal afternoon period.
So really we need to see the signs, both at the entrance to the street, and also if there are any advance warning signs. Any possibiity of you going and getting photos ?
Can you please un-redact car registration and PCN number, because without them we cannot look at the council video. You only need to redact name and address.
