Possibly not but times are changing and as the big aviation reset takes place, people may be realising that the slots that BA originally asset striped from regional airlines actually belong to the regions. Other large hub airports around the world don't seem to have a problem with the smaller airlines flying in from the regions. A former CEO of Flybe (Saad) was making inroads into reclaiming LHR slots. They were presumably called remedy slots for a reason so what's to stop them being claimed again from BA in a year or so when things pick up?
Using NQY to London as an example. Flybe were doing a good 250-300 people a day with the flexibility of three rotations. BA tried NQY in the past but gave up. Their once a day new offering is hardly going to fill the gap.