Originally Posted by thijsseh

Outgoing (772) does not look promising. Return (773) OK at the moment but that's still a while away.
My current experience is that there will be no upgrades available before check in.
But Mrs t managed to get one on 772 last night (asking at the C lounge in DXB and issued at the gate) when EF showed J5C5 a few days earlier.
Good luck.