ONE lane is blocked on the M4 Second Severn Crossing due to a multi-vehicle accident.

Initially traffic was held while emergency services attended the accident on the M4 betweenJ23 M48 and J22 M49, which is believed to have happened at around midday today.

Although the eastbound carriageway has partially reopened, the route remains partially blocked by the cars involved and officers are on the scene clearing the remaining debris.

Traffic remains slow and drivers are advised to leave extra time for their journey.