Buying US iTunes card from UK I have a US iTunes account and a friend - also from the US but currently in the UK - wants to send me an iTunes gift card. 

My question is: can he buy this card valid for the US Store with his US credit card but from his UK location. Is this possible?

And will it be sent to me digitally as I am also not in the US right now.
Yes that would be possible. You don’t have to be in the same country as your account is for.

You just can’t use an American dollar voucher on an English account as they use pounds.