Hi Constable.  The two short tracks going approx NE from Stoke Row Rd form an aprox equilateral triangle, with sides about 60 to 65 meters, ie as per G... satellite and street view.  IIRC they are unsurfaced and neither is one way.
As for the longer (residential) lanes running approx SE/NW, you could do no harm by deducing approx alignment, eg from G... satellite.
Where G.. maps gets it wrong, but OSM gets it right, is that the latter two lanes do join up near the "P" (shown on OSM) and re-join Stoke Row Rd, at 51.534947, -1.001127.
Good luck, and thanks.  I'll look forward to seeing your amendment/s.
PW