Cheap Covid-19 test kits for Ocado staff may be unreliable, union warns

Online grocer unable to explain why 100,000 kits ordered from China cost far less than rivalsCoronavirus – latest updatesSee all our coronavirus coverageOnline food retailer Ocado has sourced 100,000 coronavirus tests for its workers from China, it has emerged, raising concerns over their quality after thousands of other kits bought from the country have had to be returned because they were substandard.The grocery home delivery company confirmed over the weekend it had spent £1.5m on