Just checked the Notams and it appears that the routes in from Singas, Bangkok, Indonesia, Middle east etc etc etc are TIBA from 1 am till about 3:30. That is peak hour. This really has got to stop. Airservices MUST acknowledge that they have screwed the pooch and start enticing their staff to want to come to work at all times. When I first started, I would have been embarrassed to see a TIBA Notam. Now I just could not give a sh!t.
I actually work on that group but do not hold those ratings and I can assure you that it is not through any covert industrial action that this has occured. Tops has a wealth of guys falling over themselves wanting to work OTs. When Tops goes TIBA, it is due to nothing more than the rubber band breaking.