Can a family of four be fed for £50 a week?

Sainsbury's is launching a deal that promises it can be done. We asked three leading food writers if it's really possibleFiona Beckett: Yes you canSure you can feed your family for £50 a week, just as you can restrict yourself to 1,200 calories a day if you need to. But it takes willpower, and supermarkets aren't always the best places to exercise that. Everything ? well, practically everything ? will have to be pre-planned. You can't afford to be deflected by impulse buys, though it's worth keeping, say, a £5 float to take advantage of offers on non-perishable foods like pasta and tinned tuna and for stocking up on basics like herbs and spices (which are cheaper in independent shops than supermarkets).You'll have to stop pandering to your kids. On this kind of budget you can't afford

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