National Express said: "An empty National Express vehicle caught fire at Gatwick Airport earlier this afternoon. We are working closely with the emergency services and will continue to assist them.
"We will also carry out our own thorough investigation to establish the cause of this highly unusual incident."
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Holly has the latest weather forecast for the west of the region.
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The sister of Sean Benton who was found shot dead at an army barracks 23 years ago, says she is determined to find out exactly how he died.