Like WWW I think it is a decision that in time he will regret making.
He will I suspect be spending far more time with his family in the years ahead.
If he had got that job with Korean he would have spent months away during training and then would have to commute monthly back to UK for days off.He would be far worse off than when in BA for time with his family.
With any Middle East airline he would have to be based there so he would have to drag his young family to the desert, perhaps on an F/O's salary.
I suspect also and I hope I am wrong in this but his "notoriety" for want of a better word will follow him wherever he goes. Just look at Pablo Mason as an example.
Expat airlines want quiet pilots with no "form" whether good or bad and will hate the publicity which will follow this individual.
Talk of writing a book and after dinner speeches will be the kiss of death and should only be contemplated when all hope of a flying job have disappeared.
It was as WWW said a strange decision from one presumably? with a secure position within BA during the worst downturn in aviation I have ever known.
Best of luck Mmmayday38 because you are certainly going to need it.
PS Big mistake saying a single word to the Press as you are now back in the news for all the wrong reasons.