Thanks for the speedy reply, much appreciated.

My preference is something like this (essentials in Caps)

LHR-LUN (could be joburg and i do an internal return to lusaka), preferably into Asia (BEIJING-HK and if possible Singapore or Tokyo), then to South America (santiago, BA, RIO,LIMA, then to USA (preferably Tampa but can be Miami and then back to LGW.

My prefered routing looks like this

LHR-JOBURG (or LUN)-Singapre-HK-BEIJING-Tokyo-South America-Miami-LHR

Is that possible without flying back over London from Africa?

Thanks