It was snowing at midday on 11 February, but despite the cold, Londoners came to demonstrate with 'Stop the Killing' outside the Treasury. It was the middle of a high air pollution episode, and this health emergency was uppermost in the mind of many. Some Southwark Green Party members joined Southwark Cyclists to ride to central London along a quiet back route through Burgess Park and Kennington. Others came on foot. In that week alone, three cyclists and one pedestrian had been killed on London roads. The assembled crowd lay down on the tarmac for a minute in memory of all those killed already this year. Speakers including Caroline Russell, Green member of the London Assembly, pointed out that failure to invest in active travel is deadly in many ways.