Marine ply (or similar sheets) (Pednor Mead Farm HP5)

Someone has helpfully dumped 3 or 4 sheets of what looks like marine plywood ~10mm thick at the bottom of my garden. Before I shell out to have it removed thought I'd see if it was any use to anyone. It's pretty damp, so unlikely much use for construction but possibly weed suppression on an allotment or similar. Looks to be 2m x 1m approx so will need a reasonable sized vehicle. Will try and grab a photo later, obviously I can't vouch for condition etc.