Lubov Chernukhin is one of the Conservative Party's biggest donors - giving £1.7m and paying to spend time with the last three UK prime ministers. But an investigation has found her husband was secretly funded by a Russian oligarch placed under sanctions by the US for his closeness to Vladimir Putin.
Lawyers for Mrs Chernukhin say her donations have never been tainted by Kremlin influence, and the Tories say British Russians "have the democratic right to donate to a political party". However, a report earlier this year from the Intelligence and Security Committee warned donations could allow people to "assist Russian influence operations".
The Chernukhin revelations are the latest from the so-called FinCEN Files - a leak of banks' "suspicious activity reports" seen by BBC Panorama. The documents reveal how some of the UK's best known banks have allowed criminals, money launderers and sanctioned Russians to move dirty money around the world. They also show how major banks have failed to stop crime when they suspect it. Here's all you need to know about the leaks.

The government's most senior health advisers will use a televised briefing this morning to warn the UK is at a "critical point" in the pandemic and facing a "very challenging winter". Prof Chris Whitty and Sir Patrick Vallance will explain how coronavirus is spreading and will use data from other countries to show likely scenarios to come. The hope is the two men - staples of the daily virus briefings earlier this year - will better convey the seriousness of the situation than politicians.
Ministers have spent the weekend considering what further measures to take to try to halt the surge in infections. At least 13.5 million people are, or soon will be, living under tighter local restrictions - with suggestions Londoners could be next - and while those around the cabinet table agree there should not be a second full national lockdown at this stage, they don't agree on what should be done instead. You may have heard talk of a possible "circuit break" - a two-week mini lockdown - but would that work? And is a better alternative that we simply learn to live with the virus? Our health correspondent looks closer.
Labour leader Sir Keir Starmer says he will support any new measures, but is warning that failings in the test and trace system are greatly undermining efforts to combat the surge. The party's shadow chancellor will accuse the Conservatives of mismanaging public funds in response to the crisis later, and call for a jobs recovery scheme targeted at hardest-hit sectors.

Succession, Schitt's Creek and Watchmen were the big winners at this year's Emmy Awards. The ceremony was held virtually due to the pandemic, with most winners dialling in from home. Schitt's Creek won nine prizes - breaking the record for most Emmys in a single season for a comedy. Zendaya, 24, became the youngest ever winner of best drama actress for her performance in Euphoria. Regina King was named best actress in a limited series for Watchmen. She accepted her award wearing a T-shirt bearing the image of Breonna Taylor, a black woman shot and killed by police in Kentucky in March.

Escalating fears of a second coronavirus wave dominate the front pages. "This may hurt a bit' is the headline in the Metro, as it reports on the expected comments from England's chief medical officer later. The Sun goes with "Scared Whittyless". The Daily Telegraph is one of several to report that Boris Johnson is expected to tell the UK on Tuesday it's in the "last chance saloon" before a new lockdown. It understands he's considering curfews on pubs and bans on socialising. The Times says Number 10 is warning those new curbs will last for six months, but the PM is yet to firmly settle on a definitive course of action. According to the Guardian, fears of a return to panic-buying have prompted Morrisons to reinstate its door marshalls. The Daily Star claims people - or "greedy covidiots", as it calls them - are already stocking up on turkeys. The Daily Express urges everyone to "behave responsibly and unselfishly" to keep shelves stocked.

Artist Sarah Gillespie has created a series of intricate images - known as mezzotints - to highlight the plight of moths in the UK. Elsewhere, check out the one-of-a-kind supercar that's been found hidden away after more than 30 years. And finally, to mark World Alzheimer's Day, the BBC has created a catalogue of music to help people from all cultures living with dementia. Take a listen.

From elsewhere