Theo wrote:
It turns out G&D's website is utterly broken (stock on the website is just
plain wrong, so product pages don't exist, etc), but they are fine on the
phone. Everything went through smoothly, and they managed to deliver for
free next day at 9am. Prices on insulation was slightly more than Wickes
for loft roll, but much cheaper than Wickes for PIR (1.2x2.4m Celotex is
about £25 for 50mm thick and £40 for 100mm, against £45/£75 for Kingspan
TP10 at Wickes).

Gibbs and Dandy have now got a new website - which shows prices!
Prices if you aren't logged in are about the same as Wickes:
£70 for 2400x1200x100mm celotex

If I login with my cash account it falls to £40.74.
So now I can price stuff up without calling them, hurrah!

Theo