Patients and staff in the Outpatients and A and E departments have been evacuated from St Richard's Hospital in Chichester. But the fire is now out, and fire crews are in control of the incident.
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The M20 London bound carriageway has now been reopened to traffic but Operation Stack is expected to remain in place into the weekend.
Friday morning's forecast for the east of the region
Friday morning's forecast for the west of the region