It's sub-ICAO, therefore doesn't meet internationally common standards. It's also Annex II, so doesn't meet any EASA standards.
Whatever the Irish did to approve it, is almost certainly different to what the French did, and what the Germans did.
In the UK, like most countries, we also do our own thing with sub-ICAO (or EASA Annex II) aeroplanes, so unless you can prove that it was built and inspected, and is of a build standard, approved or approvable in the UK - it's a no-go. You might be able to provide that proof, but by the time you have, it will have almost certainly have been cheaper and quicker to have bought something with a G painted on the side.
I really wish sub-ICAO air law was in the PPL syllabus.
G