Lupus Street, SW1 is a convenient cycle route that enables the cyclist (and the rat-running motorist) to avoid the busy 4-lane Grosvenor Road. It is part of the London Cycle Network, so it is an official cycle route.
It is also an exemplar of how not to do cycle infrstructure. It really is total cr@p. Come with me, dear reader, on a brief tour:
First, the good bit. It's only good because the western end of the street is currently closed to traffic due to roadworks:
The cycle lane here is on the left, but most cyclists will be going right. Yet traffic in the inside lane may turn left across a cyclist. It is absolute lunacy to put the cycle lane where it is: it encourages cyclists to be exactly where they shouldn't be. Either the left turn should be banned, or the left lane should be made left-turn-only and the cycle lane should be between the two traffic lanes.
What annoys me most is they've actually spent money ruining a perfectly good road. It would be safer for cyclists if they'd done nothing at all. Because they've spent money and bought a pot of paint, it looks like cyclists should be grateful for this consideration. Someone who doesn't cycle may think: what have cyclists got to whinge about? Look at all this marvellous infrastructure! Cyclists should really pay the congestion charge and road tax like the rest of us!