Thank you very much for all the replies. Just to clarify I will be flying AA all the way through. I believe it is AA metal but not 100% sure.

Flight/Class AA57 Business Class
Origin London, London Heathrow
Destination Miami, Miami International
Departing 1005
Arriving 1545

Flight/Class AA1400 Business Class
Origin Miami, Miami International
Destination Kingston, Norman Manley
Departing 1300
Arriving 1335