Having resolved our supply chain issues, we brought home a full car load of insulation yesterday. Soon this will be attached to the formerly grotty wall of the children's bedroom, and it should be a much cosier space.
At the builder's merchant, my husband met an NBT representative who talked him through the justification for using conventional plasterboard in conjunction with the Pavadry materials. Apparently it's all in the technical manuals. I understand there's an acronym for that, but he was far too polite to use it.