This was the dramatic scene near Brent Cross this morning when four people were injured in a circus lorry fire.

A gas explosion on board a Zippos Circus living lorry in Brent Cross Shopping Centre Car Park broke out this morning.

Four people were hurt and they were taken to St Mary's Hospital, but their condition is not known.

It caused huge delays on the M1 and the A406.

Gas cylinders in the trailer may have exploded - but it is unclear whether any of these contributed to the fire.

Times Series:

The incident caused severe delays and traffic and a slip road on the A406 was shut during rush hour.

London Fire Brigade recieved 38 calls at around 7.20am.

A spokesman for the fire service said: “The fire was under control at 0956. Fire crews from Hendon and West Hampstead fire stations attended the scene.

"The cause of the fire is under investigation.”

A spokesman for Zippos Circus said: “The lorry in question was serviced and tested last week.

"The cause of the gas explosion is unknown at this point, and will be investigated.”