Drat. I'm also booked on LHR - MCO end of June 2023, originating from GLA. I had booked via LHR to avoid the one and only 06:45 shuttle from GLA, and also booked WT+ to avoid the scheduled 787 WT cabin with its IFE boxes under the seats. Managed to upgrade to Club using Avios on the return, I assume this will be honored if swapped to 777 via LGW ?