OK WLD, I did Singing Together in my junior school, in view of slagheaps and sitting on the floor of the school hall.
William Appleby (definitely not middle-class) and that screechy soprano (who undoubtedly was), but they did a least teach us some trad songs and how to sing them in tune.
After the school day I went to clogdancing classes taught by the Ellwoods at the nearby Miners' Institute where we also sang show tunes from musicals because that way they got their pupils and retained their funding.
At Grammar School I learned my instruments (free before classes), played in the orchestra (after classesl) and sang in the choral society (after all that).
After I left, the school became comprehensive, dropped all music teaching and was (last time I looked) somewhere near the bottom of the league tables.
At school I was inspired by the most marvellous teachers, most of whom had trained after military service in World War II and were determined to create a better world, especially for working class children.
I really don't think they'd approve of what they'd see today but would see some hope in the EAC philosophy.