"Minor" delays on the Metropolitan line between Chesham, Amersham and Harrow-on-the-Hill caused chaos this morning as angry commuters took to social media to complain.

A signal failure at Rickmansworth caused trains to be delayed and even cancelled, prompting one commuter to comment: “You guys really are woeful. How come you never improve? How is that possible? Why is the Metline always utter rubbish?”

Another said: “Sorry but that is not "minor" to everyone who needs to get a train at Chesham – not being able to get a train is pretty significant,” while others were asking for refunds.

Met Line officials apologised to customers for the delays and gave advice on how to get refunds for cancelled trains. 

A good service has resumed on the line.