Steel framing is quicker to put together (for the professionals -YMMV) but the thermal bridging through the insulation is significant, and needs to be dealt with by having a layer of thermal break material, and this is even more important if steel cladding is used.
I dont think I would consider a steel building to live in because of the noise factor.
Some of this can be damped down with insulation, but its not only the noise generated by high winds, but the expansion and contraction in heat as well
Thanks Hawkspur and Muri, you both make valid points that I need to consider.
There seems to be a greater number of suppliers that offer steel than timber...are there other reputable timber building manufacturers in the market apart from Customkit?
Customkit have a good name and I know people who have used them and been very happy and as dwellings rather than farm barns.
They will change things though to suit your specifications, rather than just what they show on their brochures
You might find it cheaper to get a builder to build what you want than buying through a known company