James Litherland's "Where to Turn," which you'll recognize as the inspiration for James Blake's "The Wilhelm Scream." It's unclear whether this song was produced by Blake's father, or if in fact Litherland is his father, and while not exactly an outright cover, the song was certainly used as the basis for the standout track on Blake's debut LP:

James Litherland :: Where to Turn

[via abeano. head there to download Blake's cover of Joni Mitchell's "A Case of You"]