When satnav and stupidity mix, the results are not pretty

Just how stupid can motorists be when it comes to satnav? The answer, according to a new survey, is very stupid indeed. How about so stupid that one motorist drove onto railway tracks and caused a train crash, or the lorry driver delivering goods from Turkey to Gibraltar who went on a 1,600 mile detour via the UK? We reveal the most stupid satnav drivers ever...