Vinyl floor underlay (Stockport SK3)

Almost a full box of this underlay, it's very thin and silver foil backed. I got this off a friend who had just had his downstairs loo floor replaced. So I imagine he didn't use much? I won't be available till next week for collection, so please bear that in mind when requesting, there will be no "I can come now" posts answered. Monday onwards only. Thank you.