I'm sure there were way more than expected. I wouldn't be at all surprised if there were more than 3000 applicants.
The next stage will be interesting though that's for sure. How do you go through that many CV's? As the application process was so simple I can only assume it will be an online test much like Aer Lingus as that would be easiest filter to eliminate ~2900 of those. This then leaves ~100 or so for CV checking and then choosing around ~50 for interview.
I wonder how many positions there are for cadets, 20 or so???
