Oh, so the 'Trombone Man' 45 is a different track! To be honest I hadn't noticed as I don't own the Junior 45 and only listened to it on the youtube clip and just presumed it was the same after only playing the LP once so far. If it was a vocal track I'd have spotted it! Hard to tell what's what a lot of times with these instrumentals. Thanks Mark.
Upsetter FC: yes, I did hear a lot of Bunny Lee rhythms for sure. Thanks for the info.