Heavy traffic on M4 at Cardiff after crash - live updates

A collision on the M4 eastbound at Cardiff has caused one lane to be closed and traffic is building in the area. The incident has happened at Coryton heading east at junction 32 at Northern Avenue and traffic officers are at the scene.

There is heavy congestion in the area near the exit slip road which, according to Traffic Wales, has been closed. You can follow live updates below.

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