The following information is known about the incident:

– Traffic has been stopped on a busy motorway in Essex on Wednesday, February 4, after a serious collision

– Vehicles have been halted on the M11 in Essex southbound between J7 (Harlow) and J6 (M25 Interchange)

– The collision involved an overturned vehicle

– National Highways said all emergency services are in attendance

– The crash has occurred near the junction for those travelling to Stansted Airport