Hi,
After a cycle survey, the situation is a little more subtle. Pre-1900, buildings were often named rather than streets (particularly as some roads were often unpaved).
Signs on the building=terrace at the East end name the main block as Park Terrace, with Hazel Grove to the North. There are _no_ signs on the highway=alley. 
I've updated the map accordingly.
Happy Mapping,

James
