It is obvious to everyone that this is organized. Sydney had only 2 shifts to cover and no one would agree to reasonable overtime as required in the EBA.
As I said before, if you're an ATCO, don't work OT, don't come in at short notice to cover another absence if you haven't had a good rest, don't extend your shift to cover your relief not making it in
Air Services needs to start motivating those who do not enough over time by rejecting pay scale increases and leave requests.