Why would a conservative leader boast about having attended a comprehensive school?

This is Peter Hitchens's Mail on Sunday column 

 

Why did Elizabeth Truss expect to be applauded for saying that she was the first British Prime Minister to have gone to a comprehensive school.  

 

Weirdly, she is not the first to make the claim. Theresa May, went to a grammar school which was gradually merged out of existence while she was there. Yet she insisted for years, in   reference books, that she attended a comprehensive. 

 

Actually, if I supported comprehensive schooling, I woul...