Police officers were filmed dragging a passenger off a busy London train after he was repeatedly asked to wear a face mask.

Footage believed to have been taken on a London Overground train yesterday starts with a British Transport Police officer ordering the young passenger to wear a face mask, or risk being kicked off.

When the officer initially warns him, the passenger replies: 'You'll have to drag me off, man. What's mandem doing?' 
 
When a mask is eventually passed to the passenger, who appears to be in a group, the officer tells them: 'Put it on, keep it on stop giving me the backchat, and all of you spread out. You're not meant to be in a group this big.'