Schools have changed to one in take. You can defer but there is not different intake dates now. I'm hoping baby I am pregnant with isn't early as he could be youngest in year or oldest. My daughter is July and I worry for her. Luckily as I am a trained teacher I can give her some support. I would hold back but I saw how kids struggled socially to make friends when kids been in same class a year. What's awful is mixed year groups are very common, the last class I taught was reception and yr one mix and I made sure the reception got foundation stage working through breaks, one school I supplied at had reception, yr 1 and yr 2 together