2 shower panels (Builth Wells LD2)

My plumber son's taken these out of a revamped bathroom and knows that I hate things going to waste! He thought someone could make some sort of use of them, inside a building. Otherwise they'll be skipped.
One is more or less unmarked. The second has holes where a shower was fitted, and a few screw holes. A VERY light marbling - you have to look hard to see it. Can anyone make use of them for anything?
Collection Times
I'm here much of the time ....