Wall remnants?

I tried to figure out what this used to be—didn't have a lot of luck, but the next snap is taken from an old OS map showing that this area has been a stand for public transport since long before the modern bus stop here.

From wander: Sequel Injection
Taken: Fri 7 May 2021 09:55
Rating: ★★

GPS Coordinates: 51.45661, -2.62365
Location: Clifton Village

Wall remnants?
I tried to figure out what this used to be—didn't have a lot of luck, but the next snap is taken from an old OS map showing that this area has been...