Karl60
Visited location.
Updated map to hopefully reflect reality.  Main points:
Mill Street is (mainly) one-way heading NNW.  There's a tiny bit of Mill Street at the north end that must be 2-way to allow cars to enter and leave the car park road.
Ref photos: 
https://flic.kr/p/2nd5jpQ
https://flic.kr/p/2nd5CjE

If someone could verify the map changes this note could hopefully be closed.
