Pictures courtesy of http://www.britainfromabove.org.uk/
(click an image for full size version)
The section leading from Cheals to the Broadfield Stadium roundabout
Cheals roundabout with Southgate West in the foreground, Cheals roundabout centre left.
Looking north west towards Langley Green - the join with the road out of town towards the top right of the picture is where Tushmore Gyratory is now.