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Two UK  teachers are attempting a round the world trip in a traditional Asian mode of transport - the tuk tuk. Nick Gough and Richard Sears are to be the first people ever to drive around the world in one of the open-sided, 3-wheeled vehicles. Having passed through 27 countries, the pair has already covered 17,200 miles and are closing in on the current world record for the longest journey in an auto-rickshaw.