The UK tried FATCA on my partner once for the USA as they was resident of Kazakhstan.... according to them in any case. Took two years to sort out due to the bloody American stupids. Someone put 07xxx xxxxxx in the wrong box so 07 and the next digit is Russia and Kazakhstan...
they once asked me how long but now they just stamp 60 it seems. I came back very recently no visa just VOA exemption UK passport and got 60. So did the other half.