M4 and A342 partially closed in Swindon and Wiltshire due to crashes; emergency services called, roads expected to remain closed most of the morning.

M4 traffic partially closed at Swindon due to a crash. The A342 in Wiltshire is also closed in both directions after an accident near Marden. Emergency services including an air ambulance have been called to the scene, and the road is expected to remain closed most of the morning. Police advise motorists to avoid the area.