I know UO Has a UK site and have used them before , but there is a bag on the U.S. site (that they don't have on UK site)they ship to the UK for about $25 but I don't know about know about import taxes , their disclaimer on the site is 'you may' encounter additional charges - wondered if anyone had ordered from US and whether they escaped tax but if they didn't how much extra was it?
Hoping someone has experience so can advise either way!