Part of the M4 motorway is expected to be closed all day after an accident in the early hours of this morning.

A black Mercedes car left the eastbound carriageway near Leigh Delamere Services at around 2am, meaning the road had to be shut between Junction 18 (Bath) and Junction 17 (Chippenham).

National Highways did not give an exact time when traffic would return to normal, but said they expected disruption to continue into the afternoon. Diversion route today • At Bumpers Farm Roundabout take the 1st exit onto the A350 northbound towards the M4/Cirencester and continue on the A350 until you reach J17 of the M4 • Leave the M4 at J18 and take the 3rd exit onto the A46 south towards Bath. • Follow the A46 for approximately 3 miles to the roundabout with the A420 at Cold Ashton and t

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