I've seen Boris "expansion of the london cycling network" up close and personal the few times I've decided to go for really long cycles away from London zones 1, 2 and 3 - the cycling "network" out there is basically made up of tiny blue signs with a white stylized cyclist symbol every half a mile or so along the side of the road and nothing else (not even paint on the road, just near invisible signs), but that was enough for him to claim he had added a huge number of miles to the London cycling network.

Boris "achivements" are invariably just traditional posh-boy lying: in a very strict sense not a lie, but using words ("cycling network") that leads others to understand one thing (actually usuable, properly marked "cycling lanes" that make it safer to cycle) which is completelly different from the reality (little signs on the side of the road that do not add up to a cycling lane or are even easilly spotted by drivers).