When can you overtake on the left while you’re driving on a three-lane motorway?

Explanation: Normally, an overtaking manoeuvre is carried out by passing the slower vehicle on its right. However, on a congested motorway where traffic on your right is moving more slowly than you are, it's acceptable to continue in the same lane and pass vehicles on their left.

Category: Band 1 road procedure

References: The Official DVSA Guide to Driving: Section 11, Highway Code: Rule 268