Hi went through this this year and after many calls with the registrar and the head of our nursery this is what I was told (whether it is the truth of not I dont know!).... they select the kids based on MONTH of birth. For example, there were 4 spots for boys this year in my sons birth month, 3 were taken up by siblings which left 1 spot for a new boy. They assessed 4 boys and selected 1. If you’re on the waitlist you will only receive an offer if a child from that particular birth month declines - so in our case, only if that one child pulled out. The moral of the story is that is it in large part down to luck and the way the numbers fall in that particular year. Good luck!