M4 reopens at Margam after police responded to a 'serious collision'

A pedestrian is in hospital following the collision. Credit: Traffic Wales

The M4 has opened in both directions at Margam after a "serious collision" shut it early on Wednesday morning.

It caused long delays during the morning rush hour.

Police have since confirmed a pedestrian is in a critical condition following the crash.

It involved a white heavy goods vehicle, a blue Kia Venga and a pedestrian.

South Wales Police said it is now investigating what happened.

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