Plywood sheets or similar (Yeadon, LS19 (Ruffords))

Hi. Please, if you have any strong (approx 12mm-18mm thick) sheets of plywood going spare, may I please have them? Doesn't matter if dirty or old so long as strong and not rotten or flaking. I need to temporarily strengthen a failing/rotten raised deck so that sofa delivery people won't fall through it! 😱