This was aired on the 28th March...and the name of the female fiddler is Niamh Ní Charra who had also played with Riverdance for a while.
Niamh is a brilliant musician!
She is also a remarkable young lady. She's from Killarney....toured with the European Troupe of Riverdance with a relative of mine, then transferred to the American Troupe.
She excels as a fiddler of course, but is equally accomplished on the concertina.
I have a CD of hers: