They were at it again on the latest episode (where a couple built a Barratts house on a Barratts estate).
Kept going on about ply and osb and how ply can cost as little as £5 per sqm, went on to shown them "hidden house" with its white washed ply walls and generally naff cheap looking interior. Next thing, he's showing them metal cladding for the internal walls, which he states is cheap at around £17 per sqm one minute and then around £50 per sqm the next minute! They were supposed to be doing it on a budget!
Thankfully the guy seemed to ignore most of what was said apart from some partition changes which worked and a few bits of wallpaper, the walls seemed to be plastered and the house seemed much bigger than it actually was (partly due to no loft, wonder where they will store their junk)
