Hello all, new to the forum and reasonably switched on with FFPs but a little unsure of my query. Hopefully someone has done similar or can help out.

I'm a FFP member with both BA (silver, one world sapphire) and QANTAS (bronze). I've got an upcoming booking flying QANTAS metal from LHR to AKL, I want to be sure I can use the one world lounges in LHR DXB SYD & AKL and as far as I'm aware I should be able to with my BA / one world status. At the moment my booking is registered with BA frequent flyer number, however if I changed it to my QANTAS ffp no to earn QANTAS points (at a much higher rate) would I still be granted lounge access through my BA based one world status?

Any help would be greatly appreciated.
Thanks