At any rate, the sheikh can console himself with the knowledge that the metro will be the world's biggest computer-operated train system, and its Union Station will have the world's biggest underground railway concourse.

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Alternatively, you can travel to Machu Picchu from Cusco on the luxury train operated by Orient Express.

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Stansted and Norwich airports operated normally but the Stansted Express train from London Liverpool Street is a bus service this weekend.

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