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5.04pm BST
An unvaccinated teacher in a California elementary school infected half her students and 26 people in total when she contracted the Covid-19 Delta variant, researchers for the US Centers for Disease Control and Prevention (CDC) found.
The researchers said the teacher attended school for two days despite displaying symptoms of Covid-19, and read aloud to her class without a mask during that time. Infections corresponded to the classroom's seating chart, with the students sitting closest to the teacher the most likely to be infected.
Related: Unvaccinated teacher infected half her students with Covid, CDC finds
4.54pm BST
Separate figures published by the Office for National Statistics show there have been 156,000 deaths registered in the UK where Covid-19 was mentioned on the death certificate.
As of 9am today, there had been a further 32,406 lab-confirmed Covid-19 cases in the UK, the Government said.