If you seperate out bmi from bmi Regional how much of the below makes any sense?
ABZ-MAN - flybe target
ABZ-NWI - monopoly / niche
ABZ-GRQ - monopoly / niche
ABZ-EBJ - monopoly / niche
EMA-BRU - possible Brussels Airlines target
EDI-BRU - Brussels Airlines target
EDI-MAN - flybe target
EDI-LBA - monopoly
EDI-CPH - SAS target
EDI-ZRH - Swiss target
GLA-LBA - monopoly
GLA-CPH - SAS target
LBA-BRU - possible Brussels Airlines target
BRS-BRU - currently op for SN
NCL-BRU - currently op for SN
Take away all the LHR flying and the routes above that former STAR partners will be looking closely at, it's all very niche. The MAN routes would be wide open to predatory action by flybe especially once the bmi brand is removed. Glasgow is already vulnerable as it's a single aircraft that does three rotations per weekday and spends much more time parked than flying.
Edinburgh has potential, but more so for inbound traffic by SAS on the CR9 and Swiss on the RJ100 allowing both point to point AND connectivity, Aberdeen is nicely niche however.
The question I would be asking is just how much will remain after a sale? There are no synergies or economies of scale that I can see here, quite the contrary, and former partners will quite likely be tomorrow's competitors. Four routes to Brussels, two of which are operated on behalf of a (former) partner.