Security ... think about it!
That said, the survey also reveals that a licensed London taxi, of the 'black cab' variety, is one of the safest places you can lose a mobile phone in the UK. Apparently some 80% of the cabbies which took part said that owners were reunited with phones after the driver found them and handed them into the lost property service. Lose a mobile phone in the back of a New York taxi and, a parallel survey suggests, the chance of you getting it back drops to 66%. It's not all good news for Londoners though, a similar survey three years ago reported that you had a 96% chance of getting your lost property back, so it looks like cabbies are getting less honest as the recession bites.