Jet2 got burnt last summer with quite a few non-UK pilots upping sticks and moving at a moments notice (less than 24hrs) back to their home countries for 'better' jobs.
I would suspect, but I don't know, that there will be a view that if you actually live near one of the bases, you are probably a better bet to stay with the airline in the longer term. In addition, all the contractors we had continually complained that the exchange rate between the pound and euro put them off working any longer in the UK.