When I was young, just after the war,(the second, not the first), I remember we were given, Malt, Orange Juice, and free milk at school, all free from the NHS, and basically if you were poor this helped to keep the youngsters fit, remembering in them days there was a lot of illnesses linked to bad nutrition, rickets, vitamin deficiencies, as well as polio, etc etc, the only thing there wasn't a lot of in them days amongst the poor was obesity, now we never ate fancy foods, even chicken was quite rare, but the Mothers were able to make a nutritious meal out of anything, and out of cuts of meat you would not think of eating now, tripe, Pigs feet, ( even though these are still eaten by some these days)
Nowadays its all fast food because the Mothers(and Fathers) have got no idea of how to cook,the kids don't eat fruit, don't get free milk anymore (thank you Maggie), it makes you wander what will happen when the kids of today progress to become parents, you only have to look at the growth in fast food outlets, coffee shops etc, to see where we are heading.
As an FYI, there is still free milk in schools - up to KS1. Fruit is also a big thing with many having it as a provided break time snack plus school lunch is available free up to the end of KS1.