just in case anyone is interested, I've discovered that the US site is hugely cheaper than the UK one where US labels are concerned. I bought a couple of dresses by US designer Single and markdown here put them at £130, as opposed to $130 over there. Obviously shipping would be the killer, but fortunately my sister lives in NYC and is coming for a visit soon, so she'll be my mule.
Just thought I'd mention it in case anyone is heading stateside for a hol and has a postal address they can use there, or in case you have guests heading to the UK from there.