This development of 2-  to 3-storied terraced houses is called "Balgra" (from an acronym of  "Beaulieu Avenue and Longton Grove Residents Association", though this also includes one row of terraced houses on Jews Walk). The developers, in the sixties, called it "Hillgrove Estate"; Jews Walk is also known as "The Grove", and Sydenham Hill lies to the northwest.
https://sydenham.org.uk/forum/viewtopic.php?t=432&postdays=0&postorder=asc&start=0&sid=ea7b9e2b48217dfa45637fbf42d72506