My street with over 70 houses only has 5 lamp posts and all of them are sat back next to property boundary walls/hedges etc and are 7 feet away from the road so even if they were to fit 5 charging points in them the cable would have to straddle the footpath which is illegal as a major trip hazard, even if you could put some kind of cover to protect the cable the street is at full capacity for parked cars and no way to get near a charging point, will be interesting to see what solution they come up with when we’re all forced to have electric.
Not sure with the legality claims, I’ve found no case law as such and some councils have guidance on how to lay a cable across a pathway (not across the carriageway), https://www.hants.gov.uk/transport/ev-charging-points/ev-charging-guidance