This thread may help...
http://www.golfgtiforum.co.uk/index.php?topic=287446.0
Thanks, that's helpful.
My latest GTI is fitted with the Adelaide 19's and was delivered wearing Goodyear F1s. However, all of the GTIs, fitted with the standard Richmond 18's, that I have seen at my local dealership over recent months (and I have seen quite a few and spent a lot of (involuntary and unpaid) time there!) have been booted with Bridgestone Potenza 001s. Perhaps it was just a coincidence.
My last GTI was fitted with the Bridgestone's and they were absolutely fine, except in snow or in icy conditions, when they were bloody awful. They were most definitely tyres not suited for driving in wintry conditions and, for the first time in my life, I even contemplated buying a set of winter wheels last year. I don't ever recall driving on a set of Goodyear tyres, so it's a brand new experience for me. Fortunately, it will be another six months or so (hopefully) before the question of winter wheels and tyres raises its head again.