Which vehicles should use the left-hand lane on a three-lane motorway?

Explanation: On a motorway, all traffic should use the left-hand lane unless overtaking. When overtaking a number of slower vehicles, move back to the left-hand lane when you're safely past. Check your mirrors frequently and don't stay in the middle or right-hand lane if the left-hand lane is free.

Category: Motorway rules

References: The Official DVSA Guide to Driving: Section 11