Since its first edition three years ago, the WOW!house decorator showcase at Design Centre Chelsea Harbour in London has given interior-design aficionados a rare opportunity: the chance to see the work of some of the world’s best designers up close and in person. The showcase, essentially a pop-up bungalow (albeit an extremely chic one) which is in situ throughout the month of June, comprises 20 rooms and two garden areas, each of which has been created by a designer given creative free rein. This year’s line-up includes Kelly Hoppen, Ben Pentreath, Nicola Harding and Emma Sims-Hilditch, and the results are astonishing: every room, no matter its size, is filled with detail and inspiration, and no surface is left undecorated. Here are some of the lessons we learnt when we took a tour.