The blaze broke out in Terminal Car Park 2 at about 20:45 BST on 10 October and "rapidly escalated". In a joint report, Bedfordshire's fire and police services said the most probable cause was an electrical fault or a component failure in a moving diesel vehicle. It became "overrun with flames" which spread to other vehicles, it said.

Last month it was announced that the most probable cause of the fire was an electrical fault or a component failure in a moving diesel vehicle.