Up to 2,000 lambs have been exported through the Port of Ramsgate.
RSPCA inspectors reviewed five shipments which went through the port and asked for some of the animals to receive veterinary treatment.
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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