The Other Half is currently in FCO, having flown out yesterday. He's booked in Y/Y. At LGW yesterday, a quick visit to the ticket desk saw him able to upgrade to J for £30 (and into C as a fare class, thus netting the extra TP ^ ). At that point, his return leg (into LHR) was showing as being fully booked, so he couldn't do the same for the return.
Last night, I logged onto his BA account (

) and lo and behold, the upgrade my booking option was showing. So, went through the options, only to be told that there were no seats available to upgrade to. So far, fair enough.
This afternoon, I checked EF, to find the return leg was showing J4, so I hopped onto ba.com - only to find that the "upgrade my booking" option has disappeared
The upgrade option wasn't showing before he departed, and only seemed to appear after he'd changed the ticket.
Anyone know whether it might return? He's coming back on Thursday, so a few days to sort this out....