I?ve just had a light bulb moment for the future of schools admissions- admitting children at the beginning of each term based on the month of birth. It should largely reduce the risk of summer born children not doing as well as the autumn born ones as they should be no more than 4 months younger than the oldest in the class. Though I accept 4 months can be a big difference in young children.
In my hypothetical world, if Sep-Dec born dcs start school in Jan, Jan-Apr dcs in April and May-Aug dcs in Sep with 10 in each set hence 30 in total in each class but taught in sets like they are supposedly done now. Each set of 10 intake can be further divided into 2 sets for example, a higher ability group and others.
Obviously this will mean 3 academic years across each stage of education so Jan intake will always progress to the next class up in Jan, Apr intake in Apr and Sep in Sep. Secondary schools could be changed so that some do only Jan admissions, others Apr admissions and the rest Sep admissions. A few universities already offer Jan or Sep Starts, they would just need an April start. Got it all figured out. 
I'm just curious about the Sep-Aug system and I did start a thread about it before. Since I started typing, a downside came to mind- potentially too unsettling for children to have new classmates every term? Could a system like this work or not?