Little Red and Beyond
Given that EI are currently operating the Little Red routes and that they have shown an interest in continuing the EDI/ABZ/LHR service. They also have two a/c on lease for a further two years.
It is conceivable that EI may continue to operate these services as a feeder for BA or as a t/a feed for Dublin, ie LHR-EDI-DUB & DUB-EDI-LHR.
The set up work is already done, so it may be worth a try!