If you order something from the showcase without anything needing to be done to it, they will pack it & ship it same day, you will get it 3-7 days later. They ship to the UK with UPS, who will accept payment of VAT & Import Duty (by cheque or card) on the doorstep (at least, they have for every one of my orders).
IIRC, import duty is 3.7%. You add import duty to the cost of the item, then VAT to that amount
e.g. (527*1.037)*1.175= $642.14 = £370.32 (@0.5767 rate from msn currency converter)
If you place the order by phone, they will go get the item from the shelf, give you an "in hand" description & set it aside for you right then & there. If you want something doing to it (fretwire fitted, finish applied, some extra routing etc) they will massively under-promise/over-deliver on times (e.g. quoted me 6 weeks for a neck finish, got it in 3). I'm surprised at Phily's comment about the shipping - they calculated & told me the shipping cost while I was on the phone.
I cannot speak highly enough of Warmoth as a company to deal with. The guitars have turned out pretty damn nice too... :)