The study (or whatever you want to call it) I referred to is based on interviews with professional pilots. The gist of it is, that in the current climate (with a shortage of piloting jobs), pilots are more likely to accept working conditions that adversely affect safety. The most named factor is fatigue. Some report 12hr working days with 4 to 5 flights per day for sometimes 7 days in a row. As most pilots feel 'replaceable' they wait too long to speak up or don't do so at all. This seems more common in LCC carriers than in network carriers. Not necessarily only to do with culture but maybe there are simply more i.e. unemployed 737 qualified drivers out there than A380/787/777.

Now, my argument was not that BA pilots are not safe but you see a tendency in BA to increase workload and reduce recovery time for cabin crew. Whilst that in and of itself may be a contributing factor to overall safety, I think that the level of attrition is a greater contributor. Experience helps. Not all incidents are about flying the plane or evacuating it in an emergency. It can also be about securing a cabin or rendering assistance in an emergency.

It would not surprise me if - in a galaxy far far away - studies aren't done within BA to create a Mixed Flight Crew model too.