Originally Posted by Cymro

There are basically two ways for him to be a regular: he's either causing problems disproportionately and getting the staff's attention that way, or he's constantly flying on very cheap tickets and drinking his fare before he's boarded.
Otherwise, if he's a genuinely high value customer, at least compared to any other GF guest, he'd be in the Concorde Room.
That's actually more shocking than his behaviour.