Hi Tobiwan,
I had someone PM me with a similar concern yesterday - almost a week gone and no response.
I assume NATS say it's a 15 working day waiting period for all stages so probably only fair to give them their time... I also assume the Stage 3 results are taking priority on HR's task list at the moment.
If you haven't heard by the end of next week, maybe worth giving them a call...
Good luck to all those waiting - I know it's not nice!