Forecasters warn of frequent lightning, large hail, gusty winds, and brief heavy downpours in some areas Get the free Morning Headlines email for news from our reporters across the world Sign up to our free Morning Headlines email Sign up to our free Morning Headlines email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Britain's record-breaking heatwave is nearing its end, despite an amber warning for extreme heat being