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Karting stars with nerves of steel take to the tarmac at Buckmore Park

If you were anywhere near Chatham in Kent today, you may well have heard the deafening sounds of dozens of vehicles taking to the tracks on a racing circuit. But it wasn't car or bikes whizzing round, it was go-karts. And the drivers, reaching speeds of up to 85 miles an hour, were all under eighteen. Andrea Thomas reports.