From yesterday's boris bike bliss (Awesome, I do heartily recommend) I had an absolutely awful commute today. Taking off in the wrong gear on princes st, my chain snapped (yes, I hadn't heeded anyone's warning here to get a new one).
So put it back together and trundled up to TBW to get a new one which was duly fitted (twice to take into account the mistake I always make threading it up).
Can you guess what the punchline is as I set off into the wild blue yonder...