UPDATE: 9.18am

The M4 at the Second Severn Crossing has been shut in one direction because of a broken down crane.

The eastbound carriageway closure has caused disruption between J22 and J23.

Gwent Police said the crane had had a blow-out and oil leaked onto the carriageway.

Police received a call at 7.20am.

UPDATE: 8.10am

Delays are possible on the M4 westbound between J24 at the Coldra and J26 Malpas due to congestion.