What basic rule applies when you’re using a motorway?

Explanation: You should normally travel in the left-hand lane unless you're overtaking a slower-moving vehicle. When you've finished overtaking, move back into the left-hand lane, but don't cut across in front of the vehicle that you've overtaken.

Category: Motorway rules

References: The Official DVSA Guide to Driving: Section 11, Highway Code: Rule 264