There’s been a collision. A motorcyclist is lying injured and unconscious. Unless it’s essential, why should you not usually attempt to remove their helmet?

Explanation: When someone is injured, any movement that isn't absolutely necessary should be avoided, since it could make the injuries worse. Unless it's essential to remove a motorcyclist's helmet, it's generally safer to leave it in place.

Category: Incidents, accidents and emergencies

References: The Official DVSA Guide to Driving: Section 16, Highway Code: Page 131-132