A27 in both directions closed due to flooding between A259 Bognor Road (Bognor Bridge Roundabout, Chichester) and Meadow Way (Tangmere Roundabout).
Highways report the road is unlikely to be open before 1pm.
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ITV News spoke to Nick Channing-Williams who described the freezing conditions on board the car ferry that caught fire earlier today.
Monday's weather for the east with Philippa
Monday's weather for the west with Philippa