During the Journey · Principle 6 of Six
Confirm the immediate situation as you approach the manoeuvre or decision point.
The last check is the closest one. Short-range observation confirms the immediate situation at the junction itself: the road name, the sign, the markings, the cyclist alongside, the vehicle waiting to emerge.
It is the point at which the plan meets the actual road.
A route can be confirmed, planned, learned and correctly positioned for, and still be wrong at the last moment, because roads change and maps are not always current.
The final look decides whether the manoeuvre is safe as well as correct. It is the check that catches a turning which has been closed, reversed or restricted since the route was planned.