Their wordings in email:
We are waiting for confirmation from some families and we hope to be able to contact you after the Christmas holiday to let you know about a chance at interviews
I think they gave priority to someone else , may be the one in playgroup or prenursery or siblings or foreign passport ? I m not sure
Only if some of them gave up offers then they would interview my kid.
But i suggest u to ring them if u don’t receive updates. As i didnt get reply from them after xmas and I sent a follow up email to them. And then they immediately arranged the interview for me