Reverserbucket_ Read post 45 to start.
Britain will be obligated to grandfather the rights of Foreign EU employees currently working in the UK. It'll be the opposite with other EU nations who will not have and will not choose to have a work permit infrastructure set up to grandfather the rights of British employees and particularly British Pilots (remember after a Brexit there will be a punitive response to Britain). British Pilots working throughout Europe at bases such as Leipzig, Bergamo, Hahn etc etc etc would\could be sent home on a nation by nation basis to swamp the UK with Pilots. Don't forget the UK is a significant net exporter of Pilots. At Leipzig there must be 200-300 British Pilots.
The only sensible conclusion is that a leave vote would be suicidal for British Pilots.