Shopping trolley

Our shoppers bought from a list of 40 top-selling supermarket products. As well as food and drink, personal care and cleaning items were also on our list.

The survey didn’t include fresh meat, fish or produce because for a fair comparison we’d need to consider quality. Wine and beer are also excluded – the discounts are so huge that a supermarket with a listed wine on special would have a massive price advantage.

For most items we specified a brand and a pack size. Where our shopper couldn’t find the brand or pack size specified on our list, they substituted a similar item and bought it at all three supermarkets in that city. This means the list varies slightly between cities.

For 10 basic items (such as sugar, milk, butter and flour) we specified just a pack size and asked our shoppers to buy the cheapest brand.

Our shoppers took advantage of multi-buys (we calculated a unit price) and coupon and Onecard specials.

See the Survey results for details of how the supermarkets compared in each centre.

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