UPDATE: 8.34am

Congestion is reported westbound between J24 at the Coldra and J28 at Tredegar Park.

UPDATE: 8.04am

Delays are possible on the A48M westbound between J29 at Castleton and J29A at St Mellons due to congestion.

UPDATE: 7.46am

The M4 is busy but moving this morning eastbound between J27 at High Cross and J26 at Malpas.