to ask if Irish vs U.K. passport makes a difference?

No, you have dual citizenship and can hold both.

Who said that they aren’t willing to go through naturalisation???

No, because as EU members, if you don't have an embassy of your home country where you are visiting, you're entitled to equal consular assistance from any other EU embassy that may be there. So an Irish traveller will actually have access to embassies in more countries than a British one.

That doesn't sound right at all.

You can only get an Irish passport if you are a citizen, and you can get citizenship by descent (there are hoops to jump through) as well as by residence and by being born in Ireland to an Irish parent. You can also claim citizenship and a passport via NI citizenship.

Irish ... allows them to work and reside throughout Europe.

Ignore!

No

If a uk citizen with a British passport has lived in Ireland for 20 years and wishes to apply for an Irish passport, would they have to renounce their British citizenship and passport?

I'm just repeating what others have already told you but any future grandchildren will be able to claim Irish citizenship providing your daughters get their own Irish citizenship sorted before their children are born.

Your future grand children can get an Irish passport providing their parents are registered on the FBR before they are born.

Are you new to the concept of the naturalisation process?

you can’t just immigrate to a country and apply for a passport. It takes years, a fair bit of time and money before you are granted citizenship.

Ireland I think you have to live there 5 years before you can apply for citizenship. 3 years if you’re married to and Irish citizen.

so pp is right, you can’t just “waltz into a country and apply for a passport”. And no, you can’t immigrate to a country and apply for a passport of a nearby country.

I think a lot of old birth records were destroyed in a fire in Dublin a bit over 100 years ago.

Irish passport means you can come and go into/out of the EU and the UK as much as you like. It’s a golden passport. My friend has one, as well as a UK one and she can use either to travel on.
For those who live in the UK with UK citizenship, and additional non-UK passport, the law has just changed in that you have to use your UK passport or some kind of residency certificate. The exception is if your extra passport is an Irish one. The Common Travel Area between the UK and Ireland means you can use an Irish or a UK passport to enter into the UK. (If you have a French/ German etc passport in addition to UK citizenship, then you would need to use your UK passport to enter the UK.)

Those with Irish passports get consular/embassy assistance from the Embassy of any other EU country. So they are protected in many ways. In fact, I used to live in a country abroad that was non-eu and it had no Irish embassy, funnily enough I was provided assistance from the British embassy. So it’s a win win.

Are you new to the concept of immigration???

I’ve lost track of the number of entitled Brits I’ve encountered who are frequently verbally anti-Irish, upfront about voting for Brexit, and then in the next moment pride themselves on their cleverness about getting an Irish passport by descent. Such people have usually never been to Ireland, are vaguely ashamed of their Irish heritage, and don’t know the first thing about the country. On the positive side, they’re highly unlikely to trouble us with their actual presence.

The reason you can claim Irish citizenship by descent is that Ireland takes its diaspora seriously, as a country whose former colonial exploitation caused grinding poverty and famine, and caused mass emigration. Lots of Irish people didn’t have a choice about leaving Ireland. Ireland takes its duty to those people’s children and grandchildren seriously. Even when they’re Brexitty wankers.

It's not an either or question is it?

Both the UK and Ireland allow dual citizenship. If they're entitled to Irish citizenship, they can get an Irish passport, if they're entitled to British citizenship they can get a British passport. (And if born in Northern Ireland, even more flexibility, but that doesn't sound like it applies.).

If they are entitled to both and want to know which would be best to spend money on right now, it's going to depend where they plan on traveling.

And if they aren't entitled to either citizenship but need to apply, I think they are unlikely to get British if they're living in Ireland.

@OneOfTheseNights we have just applied and waiting to register on foreign birth register under grandparent being Irish its more tricky great grandparents I believe .

Not what they asked. They asked which passport is better.

Definitely Irish, if they can get it.

In order to get an Irish passport, you need to have one or both Irish grandparents. Great grand parents don't count.

irish one makes travel far easier. we have relatives in Northern Ireland who have both UK and Irish passports - they travel extensively all over the world. the majority of time they use irish passport as they say its just easier especially since brexit. an Indian colleague of mine has just got her irish citizenship. she has lived here over 6 years now went to college here work here and just bought a house. she had to give up her Indian passport her husband will apply next year for his. its makes work travel especially much easier for her. another relative lives in new Zealand and wanted to travel to UK before coming to Ireland. she couldn't use her new Zealand passport for some strange reason because if brexit she was told that's all. she then had to spend time and money going to the embassy to get her irish one renewed.

I think most people never really think about what having a passport/nationality actually means. It means you belong to that country and it has a claim on you, and that ultimately if they have to countries can prioritise you or deprioritise you as they deem fit (tax, national service, treason, etc).

Instead there’s almost a feeling that you can pick these up as a handy option to get working rights or make life otherwise more convenient. There was some idiot MP during the Brexit kerfuffle who said he’d simply get round it by getting an Irish passport. But it turned out he didn’t have any link to Ireland so clearly had never thought about it either.

We’ve all got fat and complacent and have rather forgotten that there are times when these things can really, really matter. I include governments in this too – they hand out huge numbers of the things on the basis of often-not-actually-that-much-belonging, and if we do get hard circumstances again and that all has to be unpicked, it’s going to be a massive problem. I sometimes wonder, if we tried to conscript an army now, could we actually do it, or would we find our young people just melt away?

Yeah