I remember our school lunches were completely foul, and I avoided having to eat them whenever possible. I used to go most of the day on the tiniest portion of cereal I could get away with. Tea was always fairly substantial, sandwiches, or something hot, and homemade cakes. My mum reminded me the other day she used to spend most of Fridays baking 4 family sized cakes a week, plus pies, puddings etc
We didn’t have much at all in the way of “bought” foodstuffs. Perhaps a few very plain biscuits, of which we were never allowed more than 2. We weren’t allowed fizzy drinks either, except at Christmas, but we did have squash. We also walked, or as we got older, cycled to most things. I was certainly fitter, but I certainly ate more fat and sugar.