The combination of a Brass Band and a folk song can be magic.Two of my personal favourites are Robin Dransfield's version of "Spencer the Rover" on his "Tidewave" album and Roy Harper's "When an Old Cricketer leaves the Crease" from "HQ".
In my youth, with a little (lot of?) help from a flugelhorn-playing chum, I arranged Shel Silverstein's "Hills of Shiloh" for brass band, guitar and vocal (Clacton-on-Sea Silver Band and me!). I still have the dots and a tape of the performance somewhere, must dig it out.
Alan