Video shows accident at airshow, which two pilots escaped unharmed.

An investigation was under way today into a collision between two vintage warplanes at an East Anglian airshow.

The restored military aircraft were in a formation taking part in an annual Flying Legends show at Duxford, Cambs, on Sunday, when they clipped wings over farmland.

The collision can clearly be seen on this video footage uploaded to YouTube.

The impact sent one of the Mustangs plummeting to the ground, forcing its pilot to bail out. He parachuted to safety uninjured.

The Skyraider was able to fly on and land, despite losing part of its wing - damage to the aircraft can be seen in the images in our picture gallery.

Mark Brown, a pilot from Warminster who saw the crash, said the Skyraider, lost a 'large chunk of its wing tip' which fell to the ground.

He said the crash happened after three planes formed a triangle before peeling off to the left.

'As they did that the leader and the one that was following clipped each other,' he said.

'It went into a bit of a dive then sorted itself out. The other aircraft dived away from the airfield. They were only about 100 feet at this point.

'Then we saw someone jump out and a parachute open.'

Others described seeing 'large chunks of metal' fall to the ground before one entered a dive and hit the ground behind some trees.

One eyewitness said: 'Several vintage planes were flying together in formation when one seemed to fall out of the sky.

'It seemed to be missing a bit of its wing. People thought two planes might have touched wings.

'We could see blue lights going to the end of the runway. The word was that the pilot had ejected and was okay.'

A spokesman for the show's organisers, Imperial War Museum Duxford, said: 'The pilots of both aircraft are safe and have been treated by the Ambulance Service.

'The cause of the incident will now be investigated by the Air Accident Investigation Branch (AAIB) and the museum is therefore not able to comment on the likely cause.'

On its website, the museum said there would be three Skyraiders displaying at Flying Legends in a 'rare air show appearance'.

A spokesman for the AAIB said: 'The Air Accident Investigation Branch is aware of the incident and are sending a team to investigate'.