UPDATE: 9.51am

Queueing traffic is reported on exit slip road on M4 both ways at J28 A48 / A467 Forge Road (Tredegar Park), congestion on M4 to J29 A48(M) and on M4 to J24 A48 / A449 (Coldra).

Due to the traffic lights failing on the Tredegar park roundabout, queues are snaking back into lane one (Of three) of the main carriageway, severely affecting traffic flow for all three lanes in both directions after the Brynglas tunnels.

UPDATE: 8.27am

VERY slow traffic is reported on the M4 eastbound between J28 A48 / A467 Forge Road (Tredegar Park) and J24 A48 / A449 (Coldra).