I think that probably explains the difference. For example, ten years ago I only rarely saw a bike in South London. Now when I visit a friend in the Tooting/Southfields area off Garratt Lane at the weekend, the railings and bike parking areas in that general area from Amen Corner through Tooting Broadway etc are smothered in thousands of bikes locked up, often two or more deep on the railings. But during a weekday they've nearly all gone, obviously being used to cycle to work, which could be anywhere in London of course, given how many work in service industries.its interesting that my perspective is obviously wrong, most of my work is around the city, so maybe the % hasn't increased so much there, but i sit corrected