The M4 heading west is closed from about 3.18 p.m. Wednesday from J21 (M48 Severn Bridge – England Side) to J23 (M48 Severn Bridge – Wales Side) due to a fire in a truck that has been extinguished The Inrix traffic monitoring service posted at 4:45 pm: “Congestion on J19 M32 (Bristol) and also on approach M49. “The fire has been extinguished and the contents of the trucks are under control. The road remains closed after a truck caught fire earlier in the middle of the Prince of Wales Bridge heading to Wales.” There is a diversion via the M48 Severn Bridge, where there are already queues for road works and delays are “getting worse” according to Inrix. Scroll down to see photos from the fire and you can watch our live updates here.