Well so much for mass-produced industrial food being cheap. The Dairylea "lunchables" in that article are £1.50 at Tesco, and are tiny. Tiny little packets of plastic / rubbery semi-food. Not "cheese", but "Cheese Food", it's called. And not "ham" of course, but "Formed ham slices". Even the crackers have palm oil and glucose-fructose syrup in.
Just think of all the effort that went into engineering foods that can be manufactured in a factory, squirted out of nozzles, packaged in plastic, and sit in container trucks/ships for months as they are distributed around the world.
Then think of all the lovely things you could do with real food for £1.50 to make lunch, even these days. Crikey, Avocado's are expensive, but you could have an avocado with prawn cocktail and salad for £1.50.