All others in the SX
-BL* series are operated by Axon Airlines. None are Airbuses though.
Edit: On further looking Axon Airlines are now bankrupt, so it's not theirs. Air Scotland are due an A320 though after the 757 went back. Could it be Greece Airways?
2nd Edit: It is the Air Scotland A320 as I suggested. Quoted from Rinway Reports:
"Tuesday 13th June
Air Scotland acquired use of Airbus 320 SX-BLX (formerly LZ-BHA) recently, and the aircraft positioned from Glasgow to operate outbound as GRE2213 to Girona late evening."
[Edited 2006-06-17 21:43:02]
[Edited 2006-06-17 21:48:25]
Obviously missing something....