The Schools Admissions Code 2014 (2.16) states:
"Admission authorities must provide for the admission of all children in the September following their fourth birthday. The authority must make it clear in their arrangements that, where they have offered a child a place at a school:
a) that the child is entitled to a full-time school place in the September following their fourth birthday." etc.
This information was circulated by my local authority to all schools and childcare providers, not because schools disputed the facts, but because they were failing in their duty to make all parents fully aware of their right to choose, and because of complaints about heads who were deliberately making things difficult for any parent who exercised their rights.
The document continued "The Schools Admissions Code does not specifically mention the word 'full-time' nor does it make any explicit reference to short periods of induction, but the implication of paragraph 2.16 is that the place is full-time and it is at parental request that the child may take up a part-time place.
"This was confirmed in a determination by the Office of the Schools Adjudicator (OSA) in 2013, the determination document for which is available on the OSA website (case reference ADA/2479)."
The OSA has had to make more rulings, subsequent to 2013, because some schools persisted in claiming that the aforementioned case only applied to one particular school. In each instance, the OSA ruled in favour of parents exercising their legal right to a full time education and against the schools trying to impose a one-size-fits-all staggered settling programme. Note that in each case, taxpayers money was wasted as a result of a school resisting clear rules and previous OSA judgments.