"An Irish citizen residing in the UK and exercising EU rights ... acquires the right of permanent residence after 5 years. You can apply for British Citizenship after you have been resident for 12 months after you became entitled to permanent residence i.e. 6 years in total. You should apply for a permanent residence certificate because whilst it is not legally necessary it will make it easier then to apply for naturalisation."
--- from justanswer.co.uk/law website sometime in 2014
I cannot find anything in official rules and regulations on this -- either current or archived.
I understood Irish citizens are considered settled immediately upon arrival to reside in the UK, but that status is not the same as permanent residence?
Common Travel Area Guidance:
https://www.gov.uk/government/publications/common-travel-area-cta/common-travel-area-ctaInformation for British Citizens living in Ireland:
https://www.gov.uk/living-in-irelandI take that to mean: for example, I have a Canadian-Irish friend with a Canadian spouse. If they wanted to live in the UK (excluding NI), the have the option of going either:
1. the EU route
2 the spousal visa to ILR route to UK citizenship, as the Irish citizen is settled upon arrival.
Now both paths take 6 years and the first is less costly, with slightly more limitations. Once, it might have been better to go the spousal route if one wanted the UK passport more quickly.
Or
3. they could live in NI via the EU route and after 3 years, the Canadian spouse would qualify for an Irish passport, the cheapest and fastest option to an EU passport.
Or maybe I am totally wrong. The haziness of CTA privileges makes the options difficult to decipher.