Tesco expands 'dark stores' programme

Tesco is planning to expand its online grocer capacity with more "dark stores" - effectively shops without customers that fulfil grocery orders placed online.

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Mixed results for supermarkets

Supermarket giant Tesco has reported a 12% drop in group pre-tax profits to £1.7 billion in the six months to August 25. However Sainsbury's has reported strong sales for the second quarter of the year, with total sales up 4.3 per cent.