A JACKKNIFED lorry is currently causing delays on the southbound stretch of the M40.

The accident happened between junction four, Handy Cross, and junction three, Loudwater.

One lane of traffic has been closed and traffic is queuing, after the lorry went into the central reservation.

The trailer has also come free from the lorry and is sitting on the barrier. There was a brief rolling road block at 11:45 to cone off the lane.

More later.