A driver was taken to hospital after his car struck an unmarked police car and overturned on the M20 motorway.

The police officer had parked in order to help a family who had broken down on the london-bound carriageway, at junction 7 near Grove Green, Maidstone, just before 1.30pm on Monday, when a second vehicle ploughed into his car.

The officer then gave first aid to the driver while waiting for ambulance crews to arrive. His injuries are not thought to have been life threatening.

The london-bound carriageway was closed from junction 8 to allow emergency services to access the scene and deal with the situation, and reopened at 4.45pm.

The family who had initially broken down were not injured, having retreated behind a barrier at the time of the accident.