Big problems on the M4 near Newport

There are major problems on the M4 near Newport.

An accident just after 3am in the Brynglas Tunnel means it's closed Eastbound between Tredegar Park and the Grove Park Roundabout, that's Junctions 28 to 25A.

Traffic's queueing for two miles back to the A48M.

There's already heavy traffic on the diversion route: via the A48 Southern Distributor road, to rejoin the Eastbound M4 at J24.