bad back. Want a very soft good quality double mattress

Hi John, 
 
Thanks for your question. 
 
From what you have disclosed I'd be inclined to advise that you need a level of support with fillings that give you a comfort layer; As such I'd guide you to our Pocket Sprung mattresses. This narrows it to our Origins and Artisan range of mattresses. The main difference between the 2 is that the Artisan range is constructed with natural fillings that provide a cool sleep surface. 
 
We would need to know your body weights as well as sleeping habits to discuss suitability but I would have a look at our Origins Comfort 1000 and Artisan Luxury mattresses. The Luxury is the softest mattress that we retail giving that luxurious sink in sensation. The Artisan range is one that we compare with the Vi-Spring range that can be found in stores such as Furniture Village, Harrods, House of Fraser or And So To Bed. 
 

 
We don't have anything to compare the Comfort 1000 with as most retailers don't disclose how they construct so we subsequently struggle to compare. 
 
I hope this has answered your questions fully but if you do have any further queries please don't hesitate to contact our office on 0161 437 4419. Our office is open Monday to Friday 8am to 8pm and Saturday and Sunday 10am to 4pm. 
 
Kind Regards, Lee.