For me it's a three way toss up so far between

Patrick Bouffard En Trio's Force Mineur (heads down no nonsense Massif Central boogie)

The Home Service Live 1986 concert tape (the current punch-up on another thread about recording quality only makes me think that I'd rather have the noticeable cassette wow and flutter on the Home Service recording, than not have the recording at all)

and the grace and majesty of June Tabor's Ashore.

Probably the Home Service by a short head, just purely because it's less of an unexpected delight to have new stuff from Patrick Bouffard and June Tabor to treasure.