That's funny, because I was one of the posters who pointed out to you that if you would like to know more about this topic then you can always check the national curriculum. So we can stop pretending that I am new to this conversation.
You can also check the National Archives of the Department for Education to see if grammar was part of the national curriculum prior the changes, but I think the best source of information would be the following:
Hudson, R., & Walmsley, J. (2005). The English Patient: English grammar and teaching in the twentieth century. Journal of Linguistics, 41(03): 593-622
Due to my position I have access to academic databases, but I am sure you can find a way to check this article out. Anyway, I would like to close this discussion from my part. I accept that you have different personal experience and I am glad that you shared it with us. Beyond this point, I don't see what else we can learn from each other.