The A30 High Street is closed in both directions due to an overturned car around the B3162 Crowshute Link.
A gas pipe has been damaged. Police advise drivers to use alternative routes.
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Hotter again on Monday with temperatures up to 25 degrees. Cooler on the coast and on the Isles of Scilly.
A clear night, hotter again on Monday.
Highs this afternoon of around 23 or 24 degrees. Cooler on the coast.