Latest live M4 traffic news

The M4 is the main road running between London and South Wales, passing via Slough, Reading, Swindon, Bristol, Newport, Cardiff and Swansea along the way. Much like the rest of the UK’s road network, the M4 has its areas most likely to cause tail backs – primarily where it joins the M25 on the west of London and also where it meets the M5 near Bristol. Naturally, accidents, roadworks and other traffic issues cause delays, so it pays to be on top of your journey before you start