Weatherall played this on his 6 Mix show in August, and then I stumbled upon it on emusic the other night. From their 1975 album The Legendary Skatalites In Dub, dubbery provided by equally legendary King Tubby. If you've any interest in dub the whole album is knockout- I listened to it the other night while typing away at a mammoth report/review for work, and it made the whole experience vastly better.
Skatalites_08_African Roots Dub.mp3
Skatalites_08_African Roots Dub.mp3