I have the Falklands suit, and the warm weather shirt, I am wearing now actually.
I have in the past had dealing with Arktis, including making gear for them. The stuff is good and is made here in the UK.
I would not part with my Falklands suit, and it comes with an unconditional 5 year warranty. Not cheap, but worth the money and still well below some of the "names" prices.
Its an interesting company, they do a shooting trouser with a waterproof seat stitched in. That will be on my xmas list next year.