Seville
FR8364
BHX in the past (pre-recession) used to get 20 to 30 outbound one-off charters a year (not inbound for the NEC) and these used to range from the Motor Industry, Banks or Travel Agent jollies but as far as this one goes I haven't found any obvious clues.
The motor industry ones usually have flights from other UK airports at the same time if it involves Car Dealers for a new launch.
Pete