Hmm, thanks for the info guys, still no visibility of it in the ONE booking tool, though as you say it does seem to be integrated into BA, there is no BMI flight number, so you would think it would be eligible - maybe they are waiting for the winter timetable change before adding into OneWorld inventory for RTW tickets?
Either way I'll keep an eye on it and maybe give the gold line a call and see if they can shed any light!