I have a US green card and currently live in the UK. I also have a US reentry permit so I can stay in the UK for 1.5 more years or longer if i manage to get another one. I can get a UK permanent resident status this year and then next year become a British citizen if all goes well. My plan is to get a UK PR status, become British and then move to the US using my Green Card. How risky is this plan in terms of losing the Green Card? How likely is it that US border control checks my UK immigration status and takes away my green card if they find out that I've become a UK PR after receiving it?