I believe many (most?) of the 'big name' builders are using Torrefaction, or a similar 'curing' process now - Larrivee, Taylor, Collings, Santa Cruz, Bourgeois, etc., etc. Can't speak about the 'top' UK builders because their instruments aren't on my personal radar. I haven't knowingly played a Torrefied guitar - my Martins, Collings, and Lowden are all non-torrefied instruments (all but one were built before Torrefaction became a regular thing), and I'm not looking for another guitar so I'm not going around playing them in stores.

There are frequent threads on the AGF and UMGF about Torrefaction - might be worth checking those out.

Sorry I can't be any more helpful than that.