hansen wrote:
I'm in Scotland, I know the BRs are different with regards to the
required U-value for roofs etc. but I would have thought the formula
for how to arrive at a target U-value of 0.20 W/m².K with a given
conductivity would yield the same result whether one is north or
south of the border ;-) ?

That'll be the new devolved physics then.

Owain