A green sign with a diagram showing a roundabout with exits ahead, left and right, and the following text.
Forward destinations: Edgware A5109.
Left turn destinations: Central; London ; Brent; Cross ; A1 (A41); [Hollow triangle diversion symbol].
Right turn destinations: (M25); (M1); Aylesbury; Watford; A41; Harrow; (A410).
Junction name: APEX CORNER.
Take a left at the big roundabout to stay with the A1. The left lane will let you zip past it without stopping.