Thanks Pinkman!
Flew a couple of sectors with QF (LHR-BKK - 747, SIN-LHR A380) over the last few weeks. I was a bit startled to hear it the first time and made a mental note of it the next. It didnt slam the airline directly but lots of indirect allusion. It basically said that they and their colleagues in the airline strive to be professional, uphold the highest standards of safety for their passengers and were committed to an Australian-based airline (didnt use those words but that was the thrust) etc etc. It went on to refer obliquely to the industrial action and express confidence that the travelling public and passengers would understand and share their aspirations. On one flight it was made by the capt. and on the other by the FO "on behalf of capt. XX". It was about 30 sec as a previous poster said.