An overturned vehicle has blocked a lane on the M4 between Swindon and Chippenham. 

Police have closed off the lane between junction 17 A350 and junction 16 A3102. 

A spokesperson for Wiltshire Police said: "This has happened around halfway between the two junctions. 

"At this time there are speed restrictions and lane closures and it is anticipated that a full closure maybe required later in the evening to recover the vehicle. 

"Emergency services and Highways England are at the scene dealing with the incident."