Dulwich Park yesterday was rammed with every conceivable sort of HPV (OK - so London Recumbents have one of their bases there - which would account for the banananananana bikes) but a lot of the bike traffic in there yesterday was wobbly, of all ages, riding quality road bikes, even the kids on Islabikes (Dahlink- this is Dulwich, dontcha know?) all the bikes were pristine - not a chip in the paintwork to be seen.
It's my contention that they (the bikes, and their seemingly novice riders) haven't been out much, if at all, since the day that Santa delivered their steeds.
Just a guess though.