Complex sentence: The Jamaican single was on the Treasure Isle label, and the UK single (Trojan TR 622) had "Love Letters" by Phyllis Dillon and Alton Ellis as the B-side.
Split into simpler sentences: The Jamaican single was on the Treasure Isle label. The UK single (on Trojan TR 622) had "Love Letters" by Phyllis Dillon and Alton Ellis as the B-side.