Live updates as M4 crash blocks section of motorway

An accident blocked part of the M4 near Swansea for a time on Monday morning (December 18) causing delays of more than 30 minutes. The westbound carriageway was blocked by the crash between junction 45 Ynysforgan and junction 46 Llangyfelach Road. Traffic Wales, which monitors roads in Wales, said: “Blocked at this time.

Police on scene. Updates to follow.” At 8.40am they posted that all lanes had re-opened but heavy traffic remained in the area.

Traffic was also slow eastbound as traffic slowed past where the accident happened.

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