Given that it's a negative and what I see I'm not really tempted anyway, but I guess the location is Mill Hill (not Hendon, Colindale or Edgware) if it's NW7. The A1 is quite a long road much of it being Mill Hill, so a better description of the location would be good.
(e.g. Page Street and The Fairway are both Mill Hill and off the A1 but quite a distance apart).