you can feed a family on £20 per week. But it's not healthy and is as dull as ditchwater.
I know because I do it.
If you can manage to save £1 a week for a month you can buy a 'big' value rice, and a big value pasta. Then frozen veg mixed veg from iceland (and frozen mince). Some jars of value sauce, some eggs, some chips and baked beans.
Of course you have, cottage pie every monday, egg and chips every tuesday, toad in the hole every wednesday, pasta bog (pasta cheaper than spaghetti) every thursday, a veg curry on fridays, boiled egg and soldiers on saturday, and a roast on sunday followed by a shared tin of value rice pudding as a treat..
Every lunch is a value ham sandwich on unbuttered value bread with whatever sauce was on special offer or cheapest that week. followed by a value yogurt and a packed of value crisps. Breakfast is value cornflakes or if you have saved up value krispies.
As a snack, value rich tea biscuits (one per person per day should last one pack for a week).