Stock in Eu BUT I want it back, how?

Well Due to the exorbitant fees being charged for storage on the continent I have decided I need to bring back all the stock I possibly can from there. (part of my retreat from fba)

But I can see no way of doing it? I cannot select UK as a country for my removal address on a standard removals page. So I tried to create a flat file as directed. But I just got back error messages in txt format that are quite indecipherable. can anybody help with this?