Breakfast - probably cooked, bacon, egg,etc. toast (pop-up toaster if you had money) Tea to drink.
Lunch - school lunches would have been meat and two veg type of thing with cooked pudding - apple pie, semolina etc.
Tea - Bread and jam with, perhaps, home-made cake. Cup of tea.
Ovaltine, bournvita or Milo at bedtime.
Also eaten - bread and lard with sugar on it. Bread and dripping. Crisps - plain with a twist of salt in packet. Rock salmon or cod and chips from chip shop. Sliced bread had just come in.
knocking that sounds like my early childhood diet, perhaps without the jam sandwiches though.
My father was still a teenager (19) in 1954 but he was the son of a farmer so he had lots of meat and dairy in his diet. Although he did National Service in the RAF from 1952-54 so I wonder what they fed him? I expect it was traditional stuff like meat pies and veg etc. I think the diet of townies and country folk would have been a bit different in those days due to the lack of supermarkets. My mother says that rationing meant that sweets and sweet products were thin on the ground, thereby explaining how good my parents teeth are! Lack of fast foods, we didn't experience things like coca-cola, hamburgers etc till my father was posted to Singapore in 1964.