I Just noticed that, Qantas on their website states the following,
In addition to Qantas Club lounges, you can relax in British Airways lounges (Terraces and Executive Club lounges) and American Airlines® Admirals Club lounges. For applicable lounge locations please visit
www.britishairways.com and
www.aa.com.
To access a partner airline lounge, simply present your Qantas Club card or Platinum or Gold Frequent Flyer card at check-in and again with your boarding pass at the lounge reception. You may also invite a guest. Note: both you and your guest must be travelling together and have onward travel that day on a flight marketed and operated by the partner airline whose lounge you wish to visit.***
Access to Partner Airline Lounges
However according to BA's web site, there aren't any more "Executive Club Lounges" in which case Qantas can be considered is in breach of false advertising.