CDNATPL : There are presently 4 dates propose for stage 1 and 8 slots for each days.
That's mean in 4 days NATS can assess 32X about 40 persons=1280.(it's really huge)
I think they won't propose new date before having filled those slot.
We can assume now that most people willing to take part of NATS selection have filled the online registration, so think will return to normal soon or later.