Airbanda, could you please explain what you mean by "diagram " in this context ?
On reflection, had BMA used the 1-11 on the Edinburgh and Glasgow routes they would have been up against BA's relatively new 757s. At Leeds BMA had the Heathrow market to themselves so could probably get away with using anything.
It was a damp lease I believe. IIRC Jeff Price was the senior captain.
BMA must have scored a good deal with Airways Cymru. I wonder why they didn't seek out more 737-200s, or even more DC9s ?