The long-anticipated London cycle hire scheme arrived today but has the mayor, Boris Johnson, transformed our capital into a bike-friendly city? Helen Pidd and Peter Walker hit the town on London's new "Boris blue bikes" to find out.
Along with Jon Snow, they review the bikes, the superhighways and talk to locals and tourists about how safe they feel hitting the streets.
Our London blogger Dave Hill fills us in on the politics of the bikes, Jill Insley tells us whether she thinks they are good value and our ethical living expert Leo Hickman tells us what they will do to London's carbon footprint. Matt Seaton and Guardian Paris correspondent, Lizzy Davies, discuss whether you can transform the culture of a city to embrace bicycles.
