Can anyone advise me about travel to Ireland and Covid?

[Bagamoyo1]

I'm tying myself in knots trying to find the information I need, but can't seem to find it on all the many NHS resources and government sites I've looked at. So I'm turning to mumsnet!

We're hoping to travel from England to Dublin in a couple of weeks.

2 adults - fully vaccinated.
16 year old - had one jab
12 year old - just completing his 10 day isolation after covid infection

Some things I've read suggest that England and Ireland are part of the "common travel area", so no testing or proof is needed.
But other places seem to suggest we need passenger locator forms, and negative PCRs for the kids.
I'd heard of a "proof of recovery" but 119 say I can't have that for a 12 year old.

Has anyone travelled from England to Ireland recently, and can tell me what we need?
many thanks

We travelled in August.
DH and I are double vaccinated- no futher action.
DCs under 12 so travelled as we did (i.e. if we weren't vaccinated would have been subject to the same testing)
If they were 12-17 they would have needed testing.
We had passenger locator forms and printed copies of our vaccination records.

It was depressingly like June 2020 when we got there, and family were very paranoid about Covid and our unvaccinated disease vectors 🙄 (despite the fact that it was the holidays and we'd been careful to reduce risks that could have scuppered the travel arrangements and were therefore lower risk than them)