Just purchased a Silent Night 8inch thick Memory foam mattress from T J Hughes (online), available in single, double & king size available single £179 RRP £379.99, double £229 RRP £399 & king size £269 RRP £609. Delivery is only £5.50
Checked out various online sites and this appears to be a very good price as most other foam mattresses have springs with a foam top layer (cheapy version) or they aremade by a obscure company that you will never have heard of, but hurry limited stock available, when I first looked double was out of stock but more was added Fri evening so I was able to bag one, keep checking you never know - this is a special purchase from said retailer so expect stock to go quickly!!!
Unfortunately I couldnt find any discount codes and they dont appear on Quidco, but still I'll get a good nights sleep knowing Ive saved some £££. These mattresses are not only good for your your back but quite nice on the wallet!