Leaked files reveal a former Russian minister, whose wife gave the party £1.7m, was sent the cash.
The country is facing a "tipping point", the health secretary says, as the government considers further restrictions.
Children's Commissioner suggests hundreds of thousands pupils are at home with pandemic-related issues.
The shadow chancellor will repeat calls for more targeted support for firms in an online speech.
Covid-19 provides an opportunity to "reset" the economy for a more sustainable future, he says.