New York CNN —Some of the United Kingdom’s largest supermarket chains are grappling with technical issues that have left customers without grocery deliveries and unable to make contactless payments. Sainsbury’s, which owns 600 grocery stores and 800 convenience locations across the country, said on Saturday that “an error with an overnight software update” has prevented the company from fulfilling “the vast majority” of grocery deliveries to customers. Sainsbury’s did not specify how many customers were affected. The malfunction only affected a small portion of orders, and impacted customers have not been charged. In-store shopping and placing online orders are not affected, Tesco said.

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