TRAVEL: M4 WESTBOUND (WILTSHIRE) - Severe delays

Severe delays, one lane closed and queueing traffic due to recovery work and accident, a camper van involved on M4 Westbound between J16 A3102 / B4005 (Swindon West) and J17 A350 / A429 / B4122 (Chippenham), congestion on M4 to J15 A346 Marlborough Road / A419 Marlborough Road (Swindon East).