hmm, can a US thing really affect super elvis when its a UK product?
Yes, due to the international IP agreement to which the US and Great Brittan are both signatories.
Its possible however that if your only site taking payment is in England, they might have to file suit in your courts and under your laws, not ours…
If you really want an answer, check with your lawyer. I am not a lawyer, and according to US law a non-lawyer giving legal advice is in of itself a crime.
According to US law you appear to have recursively incriminated yourself then 
Cas
oh teh noes !!!111
:o
That’d be like recursive n double-jeopardy…
Nah that wasnt legal advice thats was the clearly marked opinion of an amature.
Well, it’s just a bit difficult to remember, but… err… original.
EDIT: be careful, you have the “euro” word in it. You’ll have to remove if you don’t wanna have problems with Bruxelles.