it is part of the development to the west, which wasn't finished last time we surveyed - see https://www.openstreetmap.org/note/1259764 (so I'll close this additional note). This corner was due to have a footpath through to Station Road adding. Actually, checking updated Bing it looks like this might be done as well as more of the houses to the west, so will leave your note open until we've had chance to re-survey