Midi Bed With Storage These mid-sleepers that have storage are a great multifunctional piece for kids' bedrooms. These beds with a low-profile take a standard UK single mattress and squeeze with plenty of storage beneath the mattress. Many have the pull-out trundle, which is great for sleepovers. Some designs include https://www.bunkbedsstore.uk/products/bfw-corona-pine-bunk-bed-91-cm