The relevant section of the AIC is copied below:
"Should circumstances dictate, pilots may wish to establish a right-hand VFR hold between 1,500 ft QNH to 2,000 ft QNH holding East of a line drawn between Willingale (active) airfield and the Doddinghurst mast in the vicinity of Ongar town. This hold is approximately 5 nms to the East of North Weald. Pilots must maintain a good look-out while operating in this temporary VFR hold"
I think slim_slag may be right the two turning point are in a north-south direction, to the east of North Weald. There is not a clear cut inbound and outbound direction.
Maarten