There's currently three separate incidents causing hold-ups on the M4 in Berkshire and Wiltshire - westbound between J4B M25 J15 and J7 A4 Slough West, between J6 A355 Slough / Windsor and J7 A4 Slough West, and eastbound between J17 A350 / A429 / B4122 Chippenham and J16 A3102 / B4005 Swindon West.
Meanwhile traffic is very slow on the M25 clockwise from J30 A13 Lakeside / Tilbury to A282 QE2 Bridge / Dartford river crossing.
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