That's the core of it. People know it is coming, they just want to know what. It will never be an easy discussion, it will never be a happy discussion, there is likely to be a whole lot of emotion involved.
But above anything else people should be treated as adults and with respect. If they are to be made redundant then tell them so, give them their options and let them choose (assuming there are options for finish dates, alternative employment elsewhere etc) what they wish to do.
Given the scale of Qantas redundancies being talked about arrange common finish dates and give people the dignity of a farewell at the local pub. Again, that won't be a joyous gathering but it allows people to say goodbye to workmates and gives some form of genuine closure.
Whether that happens or not is a different matter, but the humanity of the people and the situation should never be overlooked.
Employees at Avalon were unceremoniously tapped on the shoulder at break times, and after returning tooling ID and uniforms, escorted from the premises. Nothing dignified about that and humiliating to boot. I really hope that the remainder doesn't suffer the same indignity.
Many years ago,I was witness to Qantas operating in a similar way in isolated cases, so I know they are capable of being complete bastards.
Perhaps dignity, compassion and humanity will prevail for the Qantas staff.