Someone on one of these threads (I can't remember which one, there are so many!) said the rapid increase in the number of private schools is directly related to Labour doing away (mostly) with the Grammar School system.
Time and time again, parents are showing that they really want greater choice in education for their children: more academic streams, selectivity in some way - they really wouldn't need to turn to fee paying if the state system accommodated these desires (which really, are most of us). Parents constantly do this via buying houses in certain school catchments, and parents who don't realise how to research this choose private as an alternative. The religious/faith schools have got their way and can select away with no penalty. The few remaining Grammars are a complete bun fight to get into, and the escalating tutoring expectations only exist because there aren't enough of them to satisfy parent demand. However: the comp brigade won't be satisfied until no selectivity exists anywhere - and they are the ones now in power. This is so completely at odds with the way people actually behave and what they want.
The governing principle now is to lift up the lowest common denominator, the poorest, the lowest achieving towards better outcomes (which is a lovely idea in theory, and as a Labour voter, this is definitely the outcome I want to vote for). However I'm coming to the slow realisation that every time Labour do come in, this happens AT THE EXPENSE of the more able/better off, at the expense of choice, and at the expense of finding best-fit options for parents and children alike. This is just bad for everyone, including the ones at the bottom of the pile. The most able and wealthy are the ones eventually paying all the taxes anyway: they are necessary to the system in order to support the "uplift" outcomes desired by all. It takes two hands to clap doesn't it? If you take away their choices, they will simply compensate by yet another "market force" as someone upthread put it. The ones at the bottom will continue to stay there.