London, Metropolitan Police, Westminster Bridge, street scams, shell game, three-cups challenge, Batman, Robin, undercover operation, creative policing, tourist safety, urban crime, law enforcement tactics, community policing, public safety, crime prevention, innovative policing, police disguises, scam awareness, public trust, police-community relations, crime deterrence, police strategy, urban safety, street crime, police innovation, law enforcement creativity, crime hotspots, tourist protection, police operations, unconventional policing, crime fighting, police costumes, public engagement, police initiatives