UKPPL,
With your present ratings, the FAA will issue with an FAA PPL with the retrospective ratings. You will have to go to one of their offices (there is usually one in every city), fill in some paperwork, then they will issue you a tempory licence which you can use until yours arrives in the post in the UK. (Its doesnt cost anything-nor do you have to wait weeks either, its done whilst you wait)
You can then go to a school, get checked out then go one your own.
Enjoy.
Homer
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Duff, Duff, that Wonderful stuff. Ummmmm Doughnuts