We have been selling beds, mattresses and sofabeds for over 35 years. Sofa Bed Mattress UK offers a dedicated range of mattresses for sofabeds. We have our own exclusive range of mattresses for sofabeds. A wide range of different widths, lengths and thicknesses. So, for the widest choice of sofabed mattresses delivered from stock, you've come to the right place. Sofa Bed Mattress UK.