The traffic in London is horrible so moped use is booming. Food delivery services use freelance couriers on mopeds to deliver to their clients since they can get to their destinations in a reasonable time. But this has spawned the formation of gangs that attack these couriers, steal their bikes, and then use those bikes to commit crimes. The situation is so bad that couriers are forming their own defense groups.
The BBC gave out cameras to couriers to record what their life is like and captured a series of attacks by gangs.