Mate of mine on a ride in London and someone tried to take his bike. He called the Police and detained the Thief. Police turned up and the thief said it was his bike. There was my mate in full cycling gear and the thief in ordinary clothes. Policeman asked my mate what pedals were fitted- then looked at his cleats. He then cuffed the would be thief and it took 3 trips to the police station to make statements and get the thief to court.