We're all used to delays on our Tube lines, normally because of a signal failure or passenger alarm.

So you can imagine the surprise commuters got on Friday, October 11 when the driver announced that the train would be delayed because of a 'customer giving birth'.

The woman went into labour at about 1pm while travelling on the Metropolitan Line , and the service was stopped at Baker Street to allow the woman to give birth while the London Ambulance service rushed to the scene.

Mother and baby were both taken to hospital.

Passengers took to social media to share their surprise journey and congratulate the new mother.

However, the Metropolitan Line didn't share the happy news...

London Ambulance Service was also coy on the nature of the incident. A spokesperson said an advanced paramedic, an incident response officer, two medics in response cars and an ambulance crew were sent to the Baker Street, where a woman was treated and taken to hospital.