JSCL.....Jet2 are Head Quartered at LBIA.
This is Building 470, which is the old Head Office of Channel Express which became Jet2...All that is left is a couple of the old gezzers who escaped the move up oop north and look after the Royal Mail and Cargo bits for Panair
( Jet2 + Titan).
They also screen various bits and bobs for the terminal shops and there's a bloke who lives in a portakabin who likes to thwack GE stuff with a hammer...but thats another story !!!
I think you will find the advertising logo on the hangar is actually there to keep the wind and rain off the x-ray machines inside
Also when the Royal Mail is sold off to PostNL and TNTPost by Cameron and chums, you will find that this last bastion of Channex will be extinguished...the embers left to burn bright in a far corner of a field at EXT airport