This deal from Wowcher
From £39 for a small single, single (£59), small double (£69) or king (£89) cool-blue pocket sprung mattress from Mattress Haven – save up to 90%
Sleep tight on this memory foam mattress. Available in 5 sizes; small single, single, small double, double & king Features a cool touch top panel. Aims to maintain your perfect body temperature. Open coil sprung mattress with a memory foam layer.