Ok, let's say I came to the UK on a fiancé visa, and then switched to FLR(M) after the wedding. In the meantime, if I've been granted citizenship of another EU member nation (through ancestry), while I was in the UK on FLR(M), what are the British citizenship implications? Do I still have to wait until I have ILR and have been a UK resident for 3 years, or is there some kind of fast-track British citizenship qualification for EU nationals living in the UK?