"Most" of the UK shops have the currency and country to ship in at the top of the page. Some deduct VAT--20% value added tax that all uk residents have to pay-- automatically and some don't. Best advice is to compare prices amongst the various online shops and see about shipping charges.
My Favourite online shop is Merlin Cycles and if you want MTB wheels- Handbuilt wheels of the top quality then this is the store to go to.
http://www.merlincycles.co.uk/Bike+S...evers/list.htm
This site has the currency at the top of the page and on the right at the top you can price it out with or without VAT.
This is one shop that has not hit the BIG time in the US but they only used to be MTB but a couple of years ago moved into road. Well worth a look.
And on Ergo and Centaur sbrifters- better priced.