While bikes now make up a fairly high proportion of vehicles in central London – 24%, according to Andrew Gilligan, Johnson’s cycling commissioner, who is standing next to him – only about 3% of trips in the centre of the city are made by bike.
What, I ask Johnson, does he think this could reach? After some thought, he goes for 20%. “Yes, it’s a big ask. But it was 20% in 1904. What’s the point of being a Conservative if you can’t turn the clock back to 1904, that’s what I want to know.”