Foam underlay (Pontfaen/Forge SY20)

We have new carpet & underlay being laid on 4 March so need to dispose of the old foam underlay before then - about 3.2m x 3.5m so hopefully useful to someone. We haven't lifted all the old carpet yet so don't know if the condition of the underlay: we assume it's been down for several years but it looks good in the corner we've lifted to check the type of underlay. (We're located between Machynlleth & Forge.)