Iphone 5 Replacement Program I purchased my Iphone 5 in New-York but i live in London, may Apple restrict me from replacing the Power/Sleep button outside of the US?
call apple, they tend to do it on a case by case basis for full phone replacements. 

That being said if it is just the sleep button, in countries like canada you  can just walk into any apple store and they do it for you, maybe try walking into a store, i would be shocked if the recall was not available in canada and not london