We probably didn't. I don't remember any hymns at primary, spart from the annual carol service, though that doesn't mean there weren't any. The singing I do remember was Yellow Submarine, which at that age, I didn't know was by the Beatles.
Middle school was Let It Be, Morning Has Broken, Where Have All the Flowers Gone? and When a Knight Won His Spurs. And all the usual Christmas carols. Oh, and There is a Greenhill Far Away to the tune of the House of the Rising Sun, which it fits really well, and I much prefer to the traditional tune.
It was only at secondary that we got traditional hymns, O Still Small Voice of Calm and To Be a Pilgrim - and pretty much only those two.
Oh, and all of them did We Plough the Fields and Scatter for Harvest Festival- which was fine, as we were a pretty rural catchment.