I've been trying to book combinations of AA and BA flights on BA.com eg BGI-MIA(AA)-LHR(BA). BA.com only seems to allow flights with BA numbers. Is this correct or does BA.com have a facility similar to the AA.com Oneworld option which I'm missing? This would be particularly useful as BA.com does not currrently allow Manage My Booking access to reservations made through AA (see recent separate thread).