I stopped on chapter 10 of 15. It feels like a blog post or two stretched to a book, repetitive and unfocused.

It started pretty well I thought. Explaining how children in his era of public schools are completely separated from their family and the rest of the country. They're then given no love or affection and effectively taught to build a protective wall of confidence, while being taught a very nationalistic view of English history. He says this then explains people like David Cameron and Boris Johnson who went to public schools at the same time as the author. They're incapable of admitting mistakes, must always show total confidence and have no understanding of what British life is actually like.