Probs a stupid question but are the xbox codes UK friendly?
All Xbox Live codes work world wide and do not matter where you live
Microsoft points are region locked and so I try to specify on each product what server it is intended for
The name will often give it away, I.E £40 microsoft credits is of cause for the UK, I also try to keep the images relevant so the image for £40 MSP will have the union jack featured like so
Hope this helps