Rumblings of a dozen or so in the next month or so. After that who knows but again rumblings of another intake in the winter (50 as a guess).
Monarch is a privately owned company so these things tend to come up at the last minute. They keep their cards very close to their chest.
If I was a betting man I would say at least 50 pilots in the next 6 months. But who really knows..........
Good luck