THREE lanes on the M25 are blocked after a car and a motorbike were involved in a collision.
Police were called at 10.10am and are currently on the scene of the accident between junction 16 and 17, near M40 junction 1.
Motorists have been warned there are already lengthy queues and delays are expected.
South Central Ambulance Service is yet to confirm if there have been any injuries.
Some reports have said a lorry was involved but this also has not been confirmed by authorities.