You are referring, presumably, to May fRoots Radio, when Keswick Bonny Lasses by the Boat Band was the 7th track played:

http://www.frootsmag.com/radio/playlists/06/05/

July fRoots Radio is now online:

http://www.frootsmag.com/radio/playlists/06/07/

and about four years worth of past broadcasts are archived.