A34 Southbound blocked, very slow traffic due to accident, a car and a van involved between M40 J9 and B430 (Weston-On-The-Green), congestion on A41 to B4030 Oxford Road (Bicester Little Chef Roundabout).
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Union members will hold rallies across the UK as part of the strike action over a rejected 1.1% pay offer.
Wednesday morning's weather for the east of the region
Wednesday morning's weather for the west of the region