CaptainmyCaptain
Fair enough - I'm guessing things were a lot less standardised in the past throughout the country! But from my experience in the areas I've lived in, it was the standard and considered not at all odd to send your children to school the term after they've turned five, especially till I would say up to about 10-15 years ago, but suggest it nowadays and a lot will look at you as if you are some conspiracy theory loving, off-the-grid, prepper type!
Many kids did used to go pretty much straight into school without much pre-school experience at five. It's very possible that the kids who used to be put in early settings were just those that were developmentally ready. Delayed children would likely have been kept at home longer or looked after by family or child minders if both parents worked. That's not the done thing now.
It's very worrying if there is increasing social deprivation in some areas that may be causing issues and it needs thoroughly looking at. But it's also concerning that some people cannot accept that there is large variation in child development - a few posters have said that they have been embarrassed that their small children aren't toilet trained. Why? If a child isn't developmentally ready to do certain things, they are not developmentally ready. Maybe I'm biased, my kids have had very asynchronous development so I've had to be accepting!