From Monday, anyone in England who tests positive for coronavirus is required by law to self-isolate for 10 days. Those who fail to do so could be fined £1,000, rising to £10,000 for repeat offenders. The rule will also apply to people contacted by NHS Test and Trace who are told they must self-isolate for 14 days because a close contact has tested positive.
Ministers hope Scotland, Wales and Northern Ireland will bring in similar penalties - although there's growing disquiet among MPs about how they've come about. Home Secretary Priti Patel says police will use "local intelligence" to find those flouting the law.
The crackdown comes after research found voluntary compliance was very low - just 18% of those testing positive and 11% of those contacted by Test and Trace went into self-isolation. The government says the system is crucial to fighting the pandemic, but NHS Providers, which represents hospital trusts, says it isn't ready for the enormous demands of winter. The body's intervention comes as a BBC Panorama investigation reveals the concerns of whistleblowers inside Test and Trace.
Elsewhere, nearly two-thirds of Wales' population will be under local lockdown by this evening. Those affected can't mix with other households indoors or leave their county unless for a limited number of reasons. Thousands of students are also in lockdown across the UK due to outbreaks at universities. Some say they feel trapped and vulnerable, prompting the Scottish government to issue new guidance designed to reassure them. Here are some tips if you're starting your studies right now.

In 2016 Donald Trump became the first presidential candidate in nearly half a century not to release his tax returns. Now the New York Times says it has seen the numbers and they reveal "chronic losses and years of tax avoidance". It says that for 10 of the 15 years it examined, Mr Trump paid no income tax at all, and in the year he entered the White House, the billionaire property tycoon and his companies paid just $750.

The president has dismissed the report as "fake news", but Joe Biden's campaign website is already selling stickers saying "I paid more taxes than Donald Trump." The presidential challenger is bound to use the claims as ammunition in the first election TV debate on Tuesday, but BBC North America editor Jon Sopel says it's not clear how successful he'll be. Four years ago, when Hillary Clinton upbraided him over how little tax he paid, Mr Trump replied: "That makes me smart." A lot of his supporters applauded.

Sir David Attenborough has been talking about his decision to join Instagram, where he has become, at the age of 94, the fastest person to rack up one million followers. He told BBC Breakfast he wanted to reach a younger audience with his message about saving the planet. The naturalist also said the UK government had "made the right noises" about fighting climate change, but it would remain to be seen how much translated into action. For his part, Boris Johnson will today promise to protect an extra 400,000 hectares of English countryside - joining a global pledge to reverse losses in the natural world.
Watch the interview with Sir David in full.

The crackdown on coronavirus rule-breakers leads several papers. The Daily Mail says people ordered to quarantine face a "knock on the door" from police. For the Daily Express it's a "dramatic escalation of state surveillance". The Daily Telegraph suggests up to 100 Tory MPs are ready to back moves to force ministers to give them a vote on future measures. Elsewhere, there's sympathy for students locked down in their halls of residence. The Daily Mirror thinks threatening to keep them on campuses over Christmas is "foolish posturing" and probably impossible to enforce. But the Sun argues that if deaths are on the rise in December, it would be "madness" to allow students to "yo-yo up and down the country" visiting parents and grandparents. Finally, there's more optimism about the prospect of a trade deal between the UK and the EU. The Financial Times quotes a British official as saying Boris Johnson "very much wants a deal", although the source adds, "but not at any price".

In this week's The Boss, meet Grace Smith, who built a global hypnotherapy firm after using the technique to give up smoking. Elsewhere, speaking of smoking, should cars carry health warnings like cigarettes? Academic and environmental campaigner Andrew Simms thinks so - here's why. And finally, Tesco has teamed up with sharing app Olio to redistribute, rather than bin, excess produce. But is giving away food for free, to anyone, really moral?

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