BA will interline to oneworld on separate PNRs.
Passengers holding separate tickets and how their baggage is being accepted, depending on the separate ticket type:
BA to BA (i.e. BA operated, BA prefix, BA paper) - Passengers and bags can be through-checked providing MCT (minimum connection times) are adhered to.
BA to oneworld member (i.e. oneworld carriers prefix, oneworld carriers paper and codeshare partners - Passengers and bags can be through-checked providing MCT (minimum connection times) are adhered to.
BA to other carriers (except oneworld carrier and codeshare partners) - Passengers and bags will only be checked to final BA destination. They will not be checked through to the final destination.
http://www.speedbirdclub.com/au/rese...ckets/?print=1
The link may require an IATA number and location. 12345678 and Australia work.
It's worth taking a print out of the link in case you encounter resistance.