A Metropolitan police spokesman said officers had completed their searches of all four properties today and no hazardous materials had been found.
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A fine start to the Bank Holiday weekend but some rain will arrive by Sunday.
A rapist has been given three life sentences for a vicious attack on an 81-year-old woman minutes after he sat next to her on a bus.
Ming Jiang, 43, was heavily in debt and chased by creditors when he murdered his wealthy friend.