Stolen bikes

Anyone missing an orange Mercian? Saw an amazing looking one the other week in Brixton, fixed with drops, front brake, ridden by a well dodgy looking geezer that blatantly wasn't his. Using his heels to pedal, snaking all over the road, looked like he didn't have a clue how to ride it properly, while a spliff was hanging out his mouth!
sounds like teenslain!?!