We would be applying Sept 25 - Jan 26 - ready for Sept 26 start. There will be a lot of parents starting next Sept currently looking at schools as they need to apply by Jan. It’s probably worth waiting until the end of this school year (May - July) or start of next x
They send you a letter out to tell you to
You usually apply a year before they start so I would assume in the next few months or beginning of next year. I don’t actually know 🤷🏻♀️