In total, the basket of 42 groceries would have averaged around £11 more at Sainsbury’s Local and £10 more at Tesco Express for loyalty scheme members, compared to their price

Which? compared the cost of 42 popular grocery items at convenience chains Morrisons Daily, Sainsbury's Local and Tesco Express against prices at their full-sized supermarkets.

An investigation has found that Tesco, Morrisons and Sainsbury's all charged more for a basket of shopping in their smaller local convenience stores.

Morrisons Daily, Sainsbury’s Local and Tesco Express against prices at their full-sized supermarkets on three occasions in June and July, also checking loyalty scheme discounts. It found the biggest price difference for the basket was at Morrisons Daily,