Why use the slots for a BLK rotation? I would have thought an LBA rotation would have made more sense given the rumored BMI withdrawal from the regions to LHR to free the slots for more lucrative international routes. I think it's only a matter of time before LHR will not feature from LBA/MME/MAN on BMI. If the train can't take the strain then airlines will have to look at LGW and LCY or even LSS/LTN!