How about - bands/artists I have seen where one of them has played with MK
Gordon Haskell - he played with Robbie McIntosh, promotion work with MK
Blazin Fiddles - one of their members - Catriona Macdonald played on A Shot at Glory
Kate Rusby - she was married to John McCusker - (bit tenuous)
Paul Brady - played a gig with MK in Ireland, cd in collaboration with MK
Sally