William Irwin (Langdale/Grasmere fiddler mid 1800s) normqally worked on his own for pub events and dances, but did have a band if required. It consisted of (at least) two fiddles and a cello. The second fiddle would have been Henry Stables (he of the Grand Hornpipe). This was, I would guess, a standardish line-up for northern England and Scotland. And maybe in the south? Hardy described bands, but were they just church bands, not dance bands? Not sure.