Benjamin Bagby performs with a lyre beautifully, saw him recently doing 'EDDA', have seen his 'Beowulf'. There is no direct tradition, but I think it's reasonable to recite poetry the way he does with lyre accompinament. Today's Irish and Welsh harpists approximate what they think might have been the style, and notation taken down from the playing of O'Carolan and others may certainly have left out some grace notes and flourishes. Check out Bagby here

http://www.earlymusic.org.uk/dirwww/a-com/benjaminbagby.html