I understand the slots only to be worth about a 35% of the total txn value. Couldn't they obtain those cheaper from another airline ? Chances are they will have to give some of those up to ?
Given that EI has a profitable business model (unlike BD which was bust when BA bought them) why not try and develop/expand esp from UK regions (via EIR) without having to touch LHR.
I think BA now has the opportunity to free up slots at LHR without needing EI if this were their strategy. They could pass the slots they use to BCN/MAD/PMI (none slot constrained). Reduce BA frequency to DUBBHD and pass to EI using larger aircraft. LBA ex LHR is undoubtedly a slot sitter (3 per day).
So I think as an enlarged IAG group with the three airlines they have flexibility to use different aircraft type or reduce route capacity (and drive up yield) but keep brand presence on all.
I can't believe with all capacity ex LON to DUB/BHD that yield can be that brilliant ?
And WW is a proud Irishman !
Just my two penneth.