BA has only one interest here: LHR slot-grabs. This is nothing new, the likes of Brymon and BRAL/Manx were also discarded along the wayside as part of this slot-grab. The only difference is that bmi would have created employment law problems as their employees were actually based at LHR and flying the same types as BA. BA's only 'responsible' action here is to their shareholders as their actions have avoided expensive employment law litigation. The employees at baby and regional have not had that LHR/Airbus toehold so they were discarded along the wayside too. (There has however been none of this 'responsibility' towards the regional employees that kept those LHR slots 'warm' for bmi for all those years. They simply weren't on the Airbus so there wouldn't be the employment law problems, so they could be discarded along the wayside.)
However, the crews at BA are going to learn about this big Trojan Horse that they have just allowed in! BA (the company) are responsible to themselves, FULL STOP!!