One lane is closed on the M25 clockwise in Kent after junction 5 for the M26/A21. Congestion stretches to junction 4 for Orpington. It's due to an accident and is causing an additional travel time of 30 minutes.
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Trains between Oxford and Didcot will be replaced by bus services for more than two weeks while engineers raise the track.
Tuesday night's forecast for the west of the region
Tuesday night's weather for the east of the region