So let me get this straight, because I am not sure I follow.
(If) EI are to be awarded 'remedy slots' which were designed to enhance competition on Scottish routes to LHR (because its would-be parent bought the competition on those routes), BA could then operate them on behalf of EI, but because EI have aircraft 'ready to go' they would operate selected services between LHR and EDI/ABZ on behalf of BA, on behalf of themselves?