Iceland is the nation’s top online supermarket, and Waitrose best in-store, according to a report by consumer watchdog Which?.

In the survey, Iceland scored 77 out of 100 and received special praise for its value-for-money prices. Waitrose received commendation for its tidy shops and helpful staff, and came top of the in-store poll, with 75 out of 100.

The Co-operative and Asda performed less well. The Co-operative only scored 57 in the in-store poll and was the only supermarket not to score a ‘good’ rating in any of the categories. Meanwhile, Asda only scored 65 in the online survey and was the only web store not rated as ‘good’ for stock availability.

The news comes as the grocery market prepares for an upheaval, with plans afoot to relax Sunday trading laws, allowing the supermarkets to open fully all week, and the government threatening to crack down on supermarket price promotions. Sainsbury’s has just committed to phasing out multi-buy deals.