You don't make many friends as a "Lycra lout", cycling aggressively across London. But - provided you can cope with the insults, near-misses and raised fists - you certainly feel smug leaving the Porsches and Mercedes to stew in the jams. The rules of the road, as far as they exist, are easy to pick up: ignore red traffic lights, "own" the street by hogging the centre line and, when that gets too crowded, veer unhesitatingly on to the pavement.