If you're on Xbox:
Go to Amazon.com and buy a $60 gift card:
http://www.amazon.com/gp/product/B00F4CFBUS?psc=1&redirect=true&ref_=oh_aui_d_detailpage_o00_
To do this, you'll need to add a US address to your address book, but you can still use a UK debit/credit card and UK billing address.
Buy it, get the code.
Go to Xbox.com, sign in, click in the top right where your profile is and go to Xbox settings. In here, click on 'Payment & billing', and then on the left 'Change my region' - when you do this you'll see that the URL in your browser is now 'en-US' and not 'en-GB'.
Click on 'Redeem code', paste in your code from Amazon and that will add $60 to your account.
Then go here:
https://store.xbox.com/en-US/Xbox-One/Games/EA-SPORTS-FIFA-16/c0f9e774-a097-4ad2-8d9b-37d8498f6eab
Click buy, and you can purchase the game using the credit in your wallet. It should then automatically download on your Xbox if it's in instant on, or you may need to go home and change your console region while you download it too, in fact I think you need to do that in order to play it today, but that's easy enought too.
Worth mentioning that I already had a random US address set up in my Xbox.com account settings, I picked an address in Portland, Oregon so that no sales tax was added to my purchase. You may need to do this first before buying anything or before it lets you add credit. I got the game for $53.99 as I have EA Access too.