So. I'm still in the middle of the fitted by crap fitters and surveyed wrong crap with Internorm and Ecotec.
I love the products of Internorm BUT their customer care is abysmal. (Surveyed and fitted by Ecotec - all condemned by building standards as wrong size/fitting/wonky. Internorm proposed a bodge job.)
I'm hoping to find an other company that has similar spec windows/doors.
And in a heaven world, a fitting company that can both repair the damage to my home and survey/fit accurately.
I've looked at Nordan and Origin.
Origin has much higher U values.
Nordan seems to be either Cardiff or Scotland.
I live in Sheffield. South Yorkshire.