Remember the guy who transformed London's landmarks with paper cutouts? Well, he's been hard at work again – this time giving some of the city's most familiar sights a festive makeover. The Royal Albert Hall's iconic dome roof has been turned into a lovely-looking Christmas pudding, while over on the South Bank, it appears that Santa has got his boots stuck in the chimney of the Tate Modern. And want to do with London's pointiest skyscraper? Turn it into a Christmas tree, obviously.