Now we have our 'Beta' sample and we have been able to try out different foam combinations, both controlled at Nottingham Climbing Centre and outside in the Peaks. It's amazing how peoples opinions differ over foam hardness, but the general consensus seems to be harder is more preferable. The size is 1m x 1.3m when opened.
I am waiting for some more prices to come in for different foam types and will ask the question price versus quality later. From testing we have discovered the mat doesn't perform as well with lots of thinner layers of closed cell foam that the user can swap around themselves. So this poses a question, would you prefer a mat with cheaper closed cell foam on the top and bottom of the mat, or a mat with better quality closed cell foam only on the top of the mat.