I think you were thinking of the British Black English variant of BEV (Black English Vernacular) - discussed here:
CREOLE ENGLISH AND BLACK ENGLISH , whereas what Leon was writing about was the language spoken (and written) in Jamaica. I think BEV has borrowed a lot from that language, but it's not the same; English-born people of Jamaican ancestry talk BBE, but it's not a creole (which is more than Leon's definition, and is properly defined if you go to my link). (And I wish Leon's blog was easier to navigate
).
b
ps -
I take the last bit back. I just tried again, and had no problem with his blog this time