Motorway lane allocation sign
A blue sign with a diagram showing the left lane exiting and two others continuing, and the following text.
Left lane destinations: N. Circular; East ; A406 e; Central; London ; Brent Cross.
Right-hand two lanes destinations: N. Circular; West ; A406 w; (A40, M4); Wembley.
Junction number: 1.
We are now rapidly running out of road! Three lanes of the M1 curve left onto what was clearly meant to be a sliproad as we make our final approach to the roundabout at Staples Corner.