London's a big, scary place for the uninitiated and toting a cumbersome paper map around with you is a big no-no. It's more or less the equivalent of hanging a sign saying ‘mug me' around your neck and you wouldn't do that, would you?

Much better to use our credit card underground map. You might be lost but there's no need to look like an idiot while doing it, is there? With all the major stations etched onto its stylish, stainless steel surface, you can navigate around ‘The Smoke' with ease. And it slips neatly into your wallet like any other credit card. It's a no-brainer, really, isn't it?