From
http://www.standard.co.uk/news/londo...-a3180236.html

District line suffers severe delays in morning rush hour 'caused by
passengers refusing to leave defective train'

A group of passengers refused to get off a defective train sparking severe
delays on the District Line during this morning's rush hour, according to
witnesses.

Tube services on the line ground to a halt this morning due to the
"customer incident."

Commuters hit out at the delays online.