AGP --> LGW

After yesterday's hoo ha of still being in 5A despite the curtain moving back to row 6 (had to call to check it wasn't an upgrade, it wasn't and they put me in 6A) then this morning the whole of the front cabin is greyed out like you would expect before T-72 except it's T-28. I'm still in 6A but all other seats back to row 11 are unselectable. (they were all available a few hours before). Now at t-25 I cannot even see the seat map, it is saying 'Seat choice available at checkin'.

Is this them switching a 734 to a 320? :-(