From the Grauniad London Bike Blog:
Asked to pick the most significant factor preventing them from cycling more in London, 40% of the 1,376 respondents chose "I worry about my safety around motor traffic."
No surprise there. The LCC points out that 16 cyclist were killed on London's roads last year. Green Party mayoral candidate Jenny Jones has recently drawn attention to Transport for London figures showing that cyclists in London have become more likely to become collision casualties since 2007.
YouGov also asked respondents to choose from a list the one change a London mayor could make that would encourage them to cycle more. "Safe and convenient cycle lanes" was the option picked by 26% and "making it safer to cycle across junctions and roundabouts" was picked by 14%. Tellingly, 45% said there weren't any changes that would encourage them to cycle more in the capital.
Another question was put to parents, who were asked about changes that would encourage them to cycle more often with their children. In this case a very large 63% said nothing would have that effect. Safe and convenient lanes came top with 16%.
The full YouGov survey results are here: