I got this off the "Fullset" album - Notes at Liberty. No idea who wrote it or whether this is ‘old trad’.
From the sleeve notes - which you won’t have if you downloaded it, presumably - this tune is composed by Michael Harrison of Full Set, It is "named after the small village of Corofin, Co. Clare, which has come to be something akin to a home for the band."
Thanks SM Scientist for the info
Thought I might include this photo - nice place too