I know the 11+ and the existence of Selective schools whether independent or state causes a great deal of divisive debate in society. Personally, the 11+ and Grammar schools has brought both sweet and sour tastes to me. The sweet being in the form of both my daughters passing the 11+. In particular DD2 passing, this despite coming to me from the care system at 4 with significant academic issues thus qualifying for an ECHP for her Autism and other related issues. Thus, the joy and emotion and sense of achievement when we find out she had passed, was off the scale and is alongside my greatest life experiences.
The sour side to the 11 + was me failing the exam and being told by my family that I was not Grammar School quality, unlike my cousins, elder and younger sisters.
I was constantly bullied for four years at my authentic 1980/1990 Kent girls Secondary Modern. This for the treasonous crime of being conscientious in my studies. It was not until I was punched in the face in the 4th year (YR10) for handing in English homework, that my wealthy parents moved me to a private Girls school. This meant I had to go in to the third year after taking the school's entrance exam because I was three years behind. I narrowly failed the 11+ this due to the appalling education I received from my Secondary School for four years.
The Grammar School educations given to my sisters and cousins enabled them to achieve both academically and professionally. However, I also understand the potential cliff- face nature of passing/failing the 11+. This potentially would have happened to me if my parents had not had the money to move me away (please not the move was not for the education I was receiving that was appropriate for my ability but for the bullying). Thus, I know how stigma can be present in families where even today my younger sister tells people I failed my 11+. Younger sister likes telling people I only got into university because my parents, bribed the private school to take me.