It’s the day of West Ham’s first match at the Olympic Stadium, and a coach load of rowdy away fans are making the journey on a wet Saturday afternoon.

A Transport for London emergency crew has stopped in the A12 tunnel to repair a pump that has overheated, but as the coach driver enters the tunnel, he loses control and hits the van.

That was the disaster scenario emergency services faced during a multi-agency exercise late on Thursday, testing how they would cope should such an accident ever happen.

The scenario, which took place in the A12 eastbound tunnel at Hackney Wick, on the edge of Queen Elizabeth Olympic Park, saw volunteers from the Casualty Union play the part of those in need of rescue in a bid to make the exercise as real as possible.

The London Fire Brigade, Metropolitan Police, London Ambulance Service and Transport for London were all involved in the exercise.

London Fire Brigade Borough Commander for Hackney, Steve Dudeney, said: “This exercise was invaluable as it brought together key partner agencies and a really realistic scenario which tested everyone involved.

“Firefighters performed very well and our officers were able to utilise their command skills to assist staff from other agencies.

“I’d like to thank all of those who organised and took part in the exercise.”