I have tried to put this as a general discussion rather than specific but it may help if I mention that the duo at Broadstairs consisted of a guitarist/banjo player/vocalist and a pipe player

The backing track featured drums, guitars and much more and was operated by foot pedal

I was informed by no less a person than Dave Goulder that he had heard the banjo player at a session and considered him very good but to me (an unqualified non-player) the performance with backing track seemed like very basic one note at a time banjo picking with all the slack taken up by the backing track