So time to put the lining on the OSR panel. A first-time for me since the guys who fitted the roof & windows did the rest.
I used spray adhesive (from Kiravans) and applied it to both sides then wait a short time.
Then I carefully applied it (a two person job), putting the lining on top of the ply. I folded the edges over then when the adhesive was set I carefully trimmed the lining back to the edge.