Undercover police used a novel tactic to arrest two scammers in London - by disguising themselves as Batman and Robin.Inspector Darren Watson and PC Abdi Osman had to "think outside the box" to catch the culprits, since the officers' faces had become too well known.Wearing their superhero costumes, they swooped to detain the two men on Westminster Bridge, where gangs target tourists with games known as the "three-cups challenge" or "shell game".

Undercover police used a novel tactic to arrest two scammers in London - by disguising themselves as Batman and Robin.Inspector Darren Watson and PC Abdi Osman had to "think outside the box" to catch the culprits, since the officers' faces had become too well known.Wearing their superhero costumes, they swooped to detain the two men on Westminster Bridge, where gangs target tourists with games known as the "three-cups challenge" or "shell game".