I was always unhappy operating a 737-300 into BIKF. Our selected alternate was BIAR, another interesting airfield. I was always keeping a close eye on PNR fuel to make it back to UK. During the day, not so bad, since Stornoway was normally available, but at night it really had to be Glasgow. Once committed, OK, BIAR it was going to be. A useable airfield, but not ideal.