Goodness me, this thread is frustrating.
I am a long-standing school governor, very familiar with the school adjudicator’s 2013 ruling.
Your child is entitled to attend school, full-time, from the start of the September following their fourth birthday. That is the reception class.
Your child does not reach compulsory school age until the 31 December, 31 March or 31 August following their fifth birthday. So you can choose to defer their place until then or attend part time.
The point is that whatever the OP’s school is saying, and whatever the strongly held views of people on this thread, the above are facts. So parents have a choice. If you want to send your child full time from day one you are entitled to do so, and if the school says no, then remind the head about the 2013 ruling and offer to take it up with the LEA or your MP.
if you feel your child needs a staggered start, then until they’re compulsory school age, you can do this.
the thread is full of people dictating what is best for other people’s children. The point is that parents have a choice.