There could soon be more bicycles in London than cars, says the city transport authority TFL. London's city streets are looking like other cities where cycling is popular, for example Beijing or Amsterdam. But what is driving the dash to get a bike? Could it be commuters are looking for a solution to traffic clogged streets, or perhaps Londoners are getting more health conscious. Lucy Burton reports.

(Picture: Cyclists near Tower Bridge in London: Copyright: BBC)