The early AIH, that's where it went back to, a320s were relatively old aircraft when we took them. Off 25 on a low pressure day there was not the performance to make the Canaries or Paphos. Going to Teeside meant only one climb to altitude so I believe greater efficiency. Also Teeside was a summer base at that stage.
As for performance off 25 Dan Air's 737 whether 200 or cfm were no better. AIH's MD 83's were of course even worse. Happy days.