The A30 in Cornwall is closed between Chiverton Cross Roundabout and the Scorrier junction near Redruth after an accident involving three vehicles.
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A derailed train at London Paddington means that trains running to and from this station are disrupted.
It will be a cloudy and in places damp start with some coastal and hill fog.
Any early rain or drizzle will soon clear and the rest of the day looks set to be dry.