OK, so assuming that there is nothing in the cupboard, here is a meal plan that I have costed at £35.76 at tesco. This includes things like salt, pepper, cooking oil, tea bags, flour, sugar and 12 pints of milk.
breakfasts
toast and peanut butter, fruit juice
toast and scrambled egg
porridge made with milk and sugar
lunch
egg rice with peas
toast with sardine and soft cheese spread x 2
peanut butter and banana sandwiches
spiced potatoes and cabbage
toast and cheese with sliced tomatoes x 2
dinners
cauliflower, bacon and potato soup with bread and butter
potato, bacon and onion bake with carrots and peas
mac and cheese with cauliflower
pasta with onions topped with a little grated cheese
jacket potatoes, beans and cheese
pea soup and bread (using onions, carrots, potatoes and marrowfat peas)
pea dahl and rice (using left over soup, tinned toms, curry powder and an extra onion)
There are enough eggs, bananas etc left over to make 2 banana loaves for snacks.
Haven't clue about calories or anything else. works out about £1.20 a day per person for 3 meals and a snack, fruit and veg. There will be potatoes, porridge, flour etc to carry over to another week, also oil, salt, pepper, tea bags, curry powder, stock cubes.
