There's no way there's 406 adult nurses alone. The lecture theatre we use just about holds my cohort and there's around 320 of us in total, all branches included. They've upped spaces this year but not that much.
Adult branch use the Belfast and Southern trusts, and because there's less of the other branches they can be spread throughout all the trusts as we've less placements available. I'm currently in the Western Trust as a children's nurse.
There's around 55 children's nurses, the same for MH and then 35 or so LD nurses, the rest are adult.
I hope this helps.