Due to the common travel area any brit can move and live in Ireland and viceversa. No irish granny required.
"If you don't have a passport , and possibly a visa too, don't try going to another country." Alan Whicker
How long would I need to live in oirland to get an oirish passport so I could live anywhere in the EU?
Long enough to pump Mick's missus and that's it. Yer a naturalised Oirish. This is how most immigrants get in.
Unless you have a license to eat in a restaurant you could face 6 months in prison and a €10k fine .... https://westphaliantimes.com/in-fra...-up-to-six-months-and-jail-and-a-e10000-fine/
The specific requirements are that you: Have a period of 365 days* (1 year) continuous reckonable residence in the State immediately before the date of your application for naturalisation and. During the 8 years before that, have had a total reckonable residence in the State of 1,460 days* (4 years)