Hi itsybitysmom
My son will be attending nursery at HLY in Sept as well, so hope to see you there! Will your child be attending half or full day? I also have a daughter in Y3.
I know the nursery are full at the moment but neither the full nor half day classes have 27 children. The full day probably have the maximum of 24 students and I believe they are not taking anymore applicants.
My daughter never went through the Kindy at HLY but in terms of Mandarin, I know from Sept, the kindy classes have been increased to at least 3 times a week for 45mins a day, which is really good.
If you really are concerned about how advanced the children will be at Reception, it might be better to speak to the teachers as they are always readily available for a chat.
From experience, you will always be informed of what your child is doing and I know with my daughter, the parents receive a short notice at the beginning of the week explaining what the students will be studying that week. All parents Kindie and Primary are able to access a weekly newsletter from the HLY website (school is going paperless) which covers what has been happening during the week. The communication from the school is very good.
I have known people who have left HLY, but only because they were relocated back to their own countries.
In terms of relationships between the parents, I suppose it depends on the parents themselves

but I know every parent (well mothers) in my daughters year and loads of others in different year groups. You will find that parents at HLY are generally very friendly..so nothing to worry about.
If you would like to meet up for a chat one day, just pm me.