This deal from Wowcher
From £89 for a medium firm memory foam mattress from FTA Furnishings!
Memory Foam: Get a medium firm memory foam mattress! Sizes: in choose in a single, a small double, a double or a king. High Density: Enjoy five inches of high density reflex foam! Medium Firm: Followed by one inch of memory foam for a delightful medium firm feel. Depth: That’s a six-inch depth in total!