Midi Bed With Storage Mid sleepers with storage give kids a fantastic multifunctional piece of furniture for their bedroom. These beds that are low in size are designed to accommodate the single UK mattress and offer plenty of storage beneath the bed. Many have a pull-out trundle, perfect for sleepovers. https://www.bunkbedsstore.uk/products/mid-sleeper-kids-bunk-bed-frame-in-grey-white