Couple of thoughts....
Flat beds are on ANU, (did it a few weeks back), but given that some of the ANU flights go on to UVF (as I did), it may not be all of them.
An insider tip for flat beds.... MAKE SURE you are going backwards. The seat has a minor flaw... it folds flat, parallel to the floor, and as any pilot will confirm, most aircraft cruise nose high. Which means, if you put your bed flat, and you are facing forwards, your feet will be slightly higher than your head, and most people can't go completely to sleep like that.
If you wander through NCW on a long haul in the dead of night. all the "backwards" folks are out cold, snoring for whichever country they hail from. The "forwards" are visibly restless!
TA