Lets not let the truth get in the way of a good rumour, but the actual number of trainers that have left due to reasons that are not 'medical' related is 5.
Some of those resignations I believe were for personal reasons.
The trainers are working very hard, but I understand that the Training Manager on the Airbus is sourcing additional trainers to ease the training burden.
As for recruitment, I have no idea, but I will ask a friend that might have some inside information.