UPDATE: 9.22am

The westbound stretch of the M4 between J26 at Malpas to J28 at Tredegar Park is now clear.

UPDATE: 8.08am

There is congestion on the slip road at J28 Tredegar Park on the M4. 

UPDATE: 7.58am 

Congestion reported westbound on the M4 from J26 Malpas to J28 Tredegar Park.

UPDATE: 7.54am

Congestion is reported on the westbound side of the M4 between J29 at Castleton and J29A at St Mellons.

UPDATE: 7.28am

Congestion is reported on the eastbound stretch of the M4 from J28 at Tredegar Park to J26 at Malpas.

UPDATE: 6.43am

The CrossCountry train that was due at Newport station at 7.10am is due to arrive there 32 minutes late at 7.42am. 

It was due to also call at Chepstow, Caldicot and Severn Tunnel Junction but those stops have been cancelled. It is scheduled to arrive at Cardiff Central station at 7.55am.