This is a Which Magazine Best Buy from March 2015.
This will be my first memory foam mattress. I've done my research and this is the best mattress I have found for myself for this market sector. It undercuts http://www.mattressnextday.co.uk
by at least £60. I've included delivery of £3.99 for a fair comparison with "free delivery" websites.
The Which best buy recommendation certainly helped me make my decision.