School dinners were definitely not better in the 80s!
Preschool - greasy lumps of battered fish with over salty mash (it is one of my earliest memories!).. Pies that were all gravy and flabby pastry and again, icecream scoops of flabby mash. If you didn't eat your main (as it was inedible and vom worthy) you didn't get pudding.
Primary - dried leathery bits of liver with icecream scoops of salty mash and a congealed gravy. Pink custard and a biscuit for desert. Flabby limp chips and overcooked mixed veg, slice of cheese and onion pie.. Chocolate concrete and a pink milkshake for desert..
At my school, the kitchen wasn't fitted for cooking, only serving (half of it was totally out of action due to a dodgy roof and wall) - so the food came from the nearby secondary school (two miles away) in an unheated van.
It was then served to the 12 people sat at the table by the two oldest kids who sat at the head of the table - this meant if they did not like you, or just were greedy arseholes, the youngest kids down the far end of the table would get the nastiest bits, and the least. I can still remember dinners where I had a chunk of solid liver, grey and dried out, and three flabby chips and nothing else.
Secondary - chips galore! Chips with everything (And they were nice chips too) chips with cheese and gravy, chips with sausage rolls, chips with pizza. In the upstairs dining hall you could get chips, rolls, salad (pre plated cheese salad or ham salad, not a salad bar where you picked your own) pizza slices, crisps, chocolate etc. Downstairs dining hall (immediately below, shared a kitchen over two floors with a central lift) you could have proper hot dinners, but these were sausage and mash, sausage and chips, fish fingers and chips, lasagne and chips... burger and chips.
Third years on could get a pass to go home for lunch or to a nominated friends house - eating at the local chippy was not permitted (however they had a back room they'd let quiet, sensible kids in to eat and this tended to fly under the radar).