Access to Qantas First Lounge flying business class ex-Sydney

I'm flying Sydney to London in November with Qantas, outbound leg in J and return in F. Those familiar with the lounges, do you think a return leg in F is enough to gain entry into the F lounge ex Sydney?

Sorry to say but no...  Understandably, you need to have a F ticket outbound or be Platinum to gain entry into the Sydney F lounge on your outbound leg.

The short answer is no. If you have Platinum/Platinum One or OneWorld repocrocal status, you will not gain entry to Sydney First lounge. 

It will be business lounges the whole way over, and first on the way home.

Try and get someone to guest you in  - vist the AFF website.