Buy Double Mattresses from Bed SOS the leading stockist of Double mattresses. Our 4ft6 Double Mattresses are available in various styles and prices points. All our Double Mattresses comply with UK safety regulations and come with the necessary manufacturer's warranty. As all our Mattresses are in stock in the UK we can offer free next working day delivery on all our 4ft6 Double Mattresses. Our Double Mattresses arrive carefully packed and fit any standard Double bed.