People living by the pyramids in Giza told us new tunnels were still appearing all the time, and that on occasions they had even seen trucks parking close to the tunnel entrances in the desert.

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But history counsels caution, too: Britain's only existing high-speed line, from London to the Channel Tunnel, has never come close to achieving its projected passenger numbers.

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England will be close to Australia when they walk down the tunnel on Saturday.

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The site in question is derelict industrial land bordering Rainham Marshes, close to the route of the proposed Channel Tunnel rail link.

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Like it or not, we've become hooked on being constantly connected, and passengers who are able to maintain that connection while six miles in the air appear to be traveling in a state of something close to silent, electronically-sated, tunnel-vision bliss.

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"I think for the first time we feel we're extremely close and there really is light at the end of the tunnel, " he said.

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On September 17th more than 130 inmates used a tunnel to flee a prison at Piedras Negras, close to the border with the United States.

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