Del Boy and Rodney
Okay, this one takes some explanation: in Britain, there’s a long-running sitcom about a pair of cockney brothers named Del Boy and Rodney. In the show’s original finale, the pair dress up as Batman and Robin, foil a mugging by accident, and end up crashing a funeral (because British humor is dark). This image is baked into the British psyche, to the point that it was even referenced in the closing ceremony for the London 2012 Summer Olympics.