Business Covid costs weigh on Sainsbury's: Grocer dives into the red Covid costs weigh on Sainsbury’s: Grocer dives into the red despite booming sales By Daily Mail City & Finance Reporter Published: 17:09 EDT, 28 April 2021 | Updated: 17:09 EDT, 28 April 2021 Covid hit: In the 12 months to March 6 April 28, 2021