LONDON — They’re used to fighting the likes of Joker, Riddler and the Penguin, but Batman and Robin have left Gotham City and set their sights on a new breed of criminal on the streets of Britain’s capital.

Instead of hunting down high-profile masterminds, the iconic crimefighting duo set their sights low-level scammers swindling unsuspecting tourists in a classic high-street hustle.

Footage shared by the London Metropolitan Police captured undercover officers, dressed as the Dark Knight…