Stolen bikes

listen i know this seems a bit weird but i saw 3 hooligans, riding around oxford circus, one was on a geared silver dawes about say, small size... my information doesn't help much but it occurred immediately that the bike he was riding could have been stolen.

i remember the frame size wasnt the biggest one (51 or something?), but it wasnt a small/kids neither. the saddle was very high to fit my size, and by that i think it could mean that the frame was small size. do you have any idea about what time it was? did the guy look comfortably riding it? were all them riding or 'sharing'?

i suppose if they were going from piccadilly to oxford circus, they were heading north, so i reckon there are more chances that it ends up in camden or NW london more than brick lane... i'll walk around anyway.

thanks very much!!