Who mentioned Licences?
I have an ATPL with a current multi-pilot rating on it but not a SEP rating.
I have to hand in my Uk licence to the Irish CAA.
So he no longer has the UK issued licence however; he could hold a UK National licence as well as an EASA licence but that wasn't the question.
He wants an SEP Class Rating on an IAA EASA Licence, straightforward.
If he can show the ATO/DTO that he had held a SEP rating in the past its just a renewal.