Sir Jim Rose is due to report to the Government in October this year on the summer-born issue because the Government now accepts evidence that, on a statistical level (see explanation of difference between statistics and individual achievement above) summer-borns do not catch up. The sort of evidence that would count, for instance, is that at University entrance level, fewer than 1 in 12 entrants are August-born. There is a report from the Institute of Financial Studies on this.
Very few other countries put children into full time school at 4 years and 1 day. In the USA, my children would be starting a year later than here. In Scotland, there is greater flexibility. There is no evidence that our children end up better qualified than in the late-starting countries.
In Bradford LEA, you have a right to put a child that you have held back by a year into reception a year later. Given that the statutory school age is 5, not 4, I think that Bradford is obeying the law and other LEAs may be breaching it. A Bradford headmaster described it as "cruel and inappropriate" to put children into full time school at 4 years and a few days old, so this is not just the ranting of a paranoid parent, and nor is it true that "there is nothing we can do".
If your August born is thriving at school, that's great. But that does not mean you cna dismiss my concerns for my immature August -born boy - as "bolleaux" or in any other way. And yes, someone has to be the youngest, but why should it be the least mature child? Remember, it is England and Wales that are out of step here, not the rest of the world.
If anyone wants links, let me know.