In the immediate aftermath of the crash the motorway’s northbound carriageway was completely closed, causing tailbacks.

At 5.43am a lorry went into the back of another lorry in the tailback of the first accident.

The driver of the HGV that crashed into the other one suffered serious life-threatening injuries.

He was released from his cab at 7am and taken by air ambulance to the John Radcliffe Hospital in Oxford.

The southbound carriageway was stopped around 7.30am so the helicopter could land.

The driver of the second HGV suffered minor injuries and was taken to Horton General Hospital in Banbury.

The M40 northbound between Junction 11 (Banbury) and 12 (Gaydon) was closed to allow emergency services to attend the scene.

The motorway remained closed until 10.30am when one lane was reopened.

However, two lanes have been shut for the majority of the day, causing long tailbacks and delays.

Any witnesses to either collision are asked to contact PS 1800 Geoff Bell on 01926 415415.