Violin, accordion, mandolin, guitar, with viola/cello variants. Ultra-detailed arrangements. Lots of forward drive. No affect. It's folk music of a kind, rooted geographically in the English West Country, but not as you'd expect it to sound.
It steams from point A to whatever point it's going to with all the train-like persistence of a Steve Reich composition. In pieces such as "I Fear You Just as I Fear Ghosts" it exhibits other properties, which pulsate with gospel trenchancy. An oddly compelling, strangely soulful music of mind and body.