This has been partially resolved by
https://www.openstreetmap.org/changeset/131114516

You can
- look into whether St. John's Place refers to the alley or the terrace.
- verify if nr.3 is signed (likely on the postbox) and add the source.
- check if nr.1 (second house) has a housename. See sign left of door.
https://www.mapillary.com/app/?pKey=1384046531977380&focus=photo

St. John's Place is abbreviated on the sign, so that'll be off the to-do list.