I lived in London for 20 years until I escaped five years ago, 15 years in a terrace street where parking occupancy was 85% or higher most of the time (except when Google last scanned it) and almost 100% in the evenings.

It was sometimes hard to get parked here never mind near your house or by a lamp post. Take a look at the street on Google street maps (Link below). These are old houses built over a century ago and many are now multiple occupancy with 1-3 cars per house. Counting lamp posts and cars (when full) there's probably one lamp post to every 15-20 cars. So lamp post charging is not going to work practically here and this is typical of many such streets.

https://www.google.com/maps/@51.5646881,-0.0087098,3a,75y,68...