You could try Freecycle. I recycled a standard mattress that way and the guy wanted it to put in his van when he visited his mother because she didn't have a spare bedroom. It was too good to go to the tip!
Regards Keith
Nah, dump it. Mine kept on remembering I suffered with a bad back so gave me one every morning until I got rid of it. Got a good old spring one again and it's great. :lol: