London residents leave an average 10,000 mobile phones in the back of taxis every month.
Passengers also forget an estimated 1,000 other tech gizmos - including iPods, laptops and memory sticks - in London cabs every month, according to a survey of London's licensed cabbies. The amount of gear left in cabs peaks during the run-up to Christmas, as passengers struggle to get out of cabs with multiple items of shopping, leaving them more likely to leave something behind.