We have kept 2 sections and are hoping to send one section to the asbestos museum in Holland. It’s a pity that we don’t have such a museum, or maybe we do?
It appears to be denser than normal AC though in practice strength will be provided by the panel shape rather than corrugation.
I posted them on Linkdin under my name and the post received many replies. I think someone said that similar products were in T&N Trafford offices. Someone also had a pattern booklet from T&N with the same oak pattern.