Two of the UK’s biggest supermarket chains, Tesco and Sainsbury’s, were hit with technical issues on Saturday; Sainsbury’s blames a software update (Bloomberg.com)

Bloomberg.com:
Two of the UK's biggest supermarket chains, Tesco and Sainsbury's, were hit with technical issues on Saturday; Sainsbury's blames a software update  —  Two of the UK's biggest supermarket chains - Tesco and Sainsbury's - were hit with technical issues on Saturday.