Page last updated at 05:00 GMT, Thursday, 21 August 2008 06:00 UK

Inside UK's largest tunnel dig

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Work is under way to dig the UK's longest non-estuarial road tunnel below the A3 London-Portsmouth road at the Devil's Punchbowl in Surrey.

When completed the mile long Hindhead Tunnel will clear 30,000 drivers a day from an infamous bottleneck.

BBC South Today's Danielle Glavin ventured underground for a sneak preview.

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