Four Die As Plane & Helicopter Collide Mid-Air
Four people have died after a plane and a helicopter crashed in mid-air over Buckinghamshire.
Two people were killed in each aircraft, Thames Valley Police said.
Police and the Air Accidents Investigation Branch (AAIB) said they have launched a joint investigation to establish the cause of the collision just after midday at Waddesdon Estate, near Aylesbury.
A Wycombe Air Park spokesman said both aircraft came from the airfield.
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