Ornella - for Gap and Banana Republic I use the European websites (it's a little strange actually, if I go to their US sites I can add items to my shopping basket, it's only during check-out that I'm told these items are not available for shipping to Europe...). Old Navy and Piperlime, part of the same group, do offer shipping to Europe through partner FiftyOne, but this is more expensive.
These are the urls (the selection is more limited than on the US sites - and, sadly for us, often there are no Tall sizes). But you don't pay import duties, and shipping costs are very reasonable:
http://bananarepublic.gap.eu/?
http://www.gap.eu/browse/home.do?ssiteID=BR_EU
RunnerChick - I just wrap the "extra fabric" tightly around my legs and tuck the pants into my socks, this way the trousers stay put while putting on the boots. Does that make sense. Love the sound of the AT teal sweater, perhaps you could go have another look;-)
Suz - It's perfectly possible that the collar size varies even with the same size, so definitely worth trying on a few sweaters to see which feels best to you.
Jules - I haven't worn the jumper out yet, but tried it on with my Winter coats and as long as I scrunch the sleeves before putting on the coats there isn't much bunching at all. I do "feel" the extra fabric is there, I don't think this is going to bother me, but perhaps someone else would find that uncomfortable?
Jeanne - I am also VERY tempted to get the blue one too. Good idea too order a different size if you're after a different fit.
Thank you again everyone for the amazing comments, you guys sure know how to put a huge smile on my face:-)