Thousands gather in London for George Floyd protest

Thousands of mostly young protesters marched through central London in an overwhelmingly peaceful Black Lives Matter demonstration that culminated in passionate crowds gathering at the heart of Westminster.

A few minutes later two demonstrators were arrested after bottles were thrown at the same group of officers, although the confrontation was short lived, and police mostly looked on as a vast crowd marched from Hyde Park to Parliament Square.

US lets corporations delay paying environmental fines amid pandemic

Ten corporations that agreed to a total of $56m in civil penalties for allegedly breaking environmental laws are not being required to make payments under a pause granted by the US government during the Covid-19 pandemic.

They signed settlements with the government agreeing to pay fines without admitting liability but the justice department last month advised most of the companies of extensions in letters which were obtained by the government watchdog group Accountable.US via public records requests.

Revealed: conservative group fighting to restrict voting tied to powerful dark money network

A powerful new conservative organization fighting to restrict voting in the 2020 presidential election is really just a rebranded group that is part of a dark money network already helping Donald Trump’s unprecedented effort to remake the US federal judiciary, the Guardian and OpenSecrets reveal.

$250,000 in advertisements in April, warning against voting by mail and accusing Democrats of cheating. It facilitated letters to election officials in Colorado, Florida and Michigan, using misleading data to accuse jurisdictions of having bloated voter rolls and threatening legal action.

The Biden senatorial papers comprise 1,875 boxes of “photographs, documents, videotapes and files” and 415 gigabytes of electronic records at the University of Delaware in his home state. They recently came to public attention when Biden was accused by Tara Reade, a former staffer, of sexually assaulting her in a Capitol Hill basement in 1993.

“The fact is that there’s a lot of things, of speeches I’ve made, positions I’ve taken, interviews that I did overseas with people, all of those things relating to my job, and the idea that they would all be made public in the fact while I was running for public office, they could be really taken out of context,” he told interviewer Mika Brzezinski on MSNBC’s Morning Joe program.

“They’re papers or position papers, they are documents that existed and that – for example, when I met with [Vladimir] Putin or when I met with whomever, and all of that could be fodder in a campaign at this time.”

Which kind of face mask will best protect you against coronavirus?

Does it matter what sort of mask you wear? Yes. Different types of mask offer different levels of protection. Surgical grade N95 respirators offer the highest level of protection against Covid-19 infection, followed by surgical grade masks. However, these masks are costly, in limited supply, contribute to landfill waste and are uncomfortable to wear for long periods. So even countries that have required the public to wear face masks have generally suggested such masks should be reserved for health workers or those at particularly high risk.

but still suggests that face masks can contribute to reducing transmission of Covid-19. Analysis by the Royal Society said this included homemade cloth face masks.

But we do have some clues. “We know from ‘normal’ coronavirus studies done in the past you can infect people after about a year following an initial infection,” said Dr Ben Killingley, consultant in acute medicine and infectious diseases at University College London hospital.

“I have yet to see a definitive case of reinfection reported in the scientific literature [to date]. To truly prove reinfection, and discriminate from prolonged viral shedding related to the first infection, would require sequencing of both the first and second viruses and demonstration that the two viruses are genetically different,” he said, adding it will also be important to look at symptoms and how long reinfection lasts.

What happened in South Korea, where patients tested positive after having recovered from Covid-19?

George Floyd killing: sister says police officers should be charged with murder

The sister of George Floyd, the black man killed by police in Minneapolis after an incident captured on video in which an officer knelt on his neck as he lay on the ground, has called for those involved in his death to be charged with murder.

The FBI and authorities in Minnesota have launched investigations into his death. The officer who knelt on Floyd’s neck is white.

Dr Anthony Fauci said he thought it was too soon to say whether the presidential nominating conventions will be able to safely take place in person this summer.

“I think we need to reserve judgment right now because we’re still a few months from there,”

The infectious disease expert said the country would have to see a signficant decline in cases in order to safely move forward with the conventions.

Twitter has started fact-checking Trump's tweets

The president accused the social media platform of ‘stifling free speech’ after it labeled his false claims about voter fraud. Plus, why Republicans want to see the Biden archive

Donald Trump raged against Twitter – on Twitter – on Tuesday, after the social media platform marked the president’s misleading posts with its new “get the facts” label for the first time since introducing the feature this month.

It begins with dramatic music and slick graphics – skyscrapers, clouds, big screens, the roar of a helicopter and chants of “Four more years!” Then come clips of Donald Trump Jr mocking Barack Obama and Joe Biden, and hurling red “Keep America Great” caps into a crowd at a rally. A fireball darts across the screen, trailing the word “Triggered”.

Welcome to the virtual Trump campaign starring his three children, Don Jr, Eric and Ivanka, and their partners, Kimberly Guilfoyle, Lara Trump and Jared Kushner. The six are among the president’s most important surrogates and strategists, constantly pushing his cause, rallying his base, trashing his opponents and earning a reputation as a modern political mafia.

“And guess what?” he said on Fox News. “After 3 November [election day], coronavirus will magically all of a sudden go away and disappear and everybody will be able to reopen. They’re trying to deprive him of his greatest asset.”

The US doctors taking Trump’s lead on hydroxychloroquine – despite mixed results

Among the most ardent proponents of these claims is the American Association of Physicians and Surgeons (AAPS), a fringe group of less than 5,000 doctors. The group was recently cited by Trump’s campaign manager, Brad Parscale, to explain the president’s stunning announcement that he is taking the drug hydroxychloroquine in an attempt to protect himself against Covid-19 despite a lack of evidence of its effectiveness.

Yet Dr Jane Orient, executive director of AAPS, told the Guardian she believed the drug “should be prescribed more often”, and in a statement based on a flawed database claimed the drug offered “about 90% chance of helping Covid-19 patients”.

: America's north-east braced for record May cold

The north-eastern US is about to get a cold spring farewell from winter’s bad boy, the polar vortex, which could bring rare May snowfall and record-low temperatures to some areas over the Mother’s Day weekend, forecasters say.

Around this time of year, the polar vortex usually breaks up, but this breakup is a bit different, said Judah Cohen, a winter storm expert for Atmospheric Environmental Research, a commercial firm outside Boston.

The US recovery from the pandemic lags way behind Europe – even as states reopen

The US may be moving to loosen social distancing restrictions around the same time as several European countries but it remains in a far different, and worse, stage of the coronavirus pandemic.

While infections and deaths from Covid-19 quickly raced to terrifying peaks in Italy and Spain, both countries have managed to arrest the increase and are now forcing the key trends downwards.

Black people four times more likely to die from Covid-19, ONS finds

Black people are more than four times more likely to die from Covid-19 than white people, according to stark official figures exposing a dramatic divergence in the impact of the coronavirus pandemic in England and Wales. The Office of National Statistics found that the difference in the virus’s impact was caused not only by pre-existing differences in communities’ wealth, health, education and living arrangements.

after other pre-existing factors had been accounted for, and females from those ethnic groups were 1.6 times more likely to die from the virus than their white counterparts.

New Zealand 'halfway down Everest' as Ardern plans big easing of Covid lockdown

Hairdressers, bars and competitive sport could be back on the agenda for New Zealanders from next week as the prime minister, Jacinda Ardern, said the country was “halfway down Everest” in its fight against Covid-19. New Zealand has been under strict lockdown restrictions for more than five weeks, but the low number of cases this week – zero for two consecutive days – means restrictions will soon be lifted.

Public spaces such as playgrounds and libraries would be reopened, bars and restaurants would be able to accept patrons, and domestic travel and competitive sport allowed to resume, including the professional leagues, but there will be no stadium crowds for now. Most workers would be allowed to head back to the office, though Ardern urged any who could stay home – or found it more productive – to do so. Widespread social-distancing rules would continue to apply, including patrons being seated two metres apart in public spaces, strangers keeping their distance from one another, and hairdressers, barbers and beauticians being required to wear PPE.

Ahmaud Arbery killing reignites debate over sharing graphic viral videos

The outrage surrounding the viral video of 25-year-old Ahmaud Arbery being shot just outside Brunswick, Georgia, is what prompted prosecutors to request a grand jury to consider charges, according to many social justice activists.

The footage released this week shows Arbery jogging down a narrow two-lane road. A white law enforcement officer and his son, whose truck is stopped nearby, shoot Arbery within seconds of confronting him.

The climate can't take a return to 'business as usual'

Mayors from 33 leading global cities have published a ‘statement of principles’ for a climate-friendly post-Covid world. Plus, why 2020 feels a lot like 1945

Can the world really return to “business as usual” after the coronavirus lockdowns – and even if it can, does that mean it should? Mayors representing 33 cities that are home to more than 750 million people have signed a “statement of principles”, published on Thursday, which commits their communities to a more climate-friendly and less unequal future.

African Americans bear the brunt of Covid-19's economic impact

Donald Trump once again praised his job creation record. “Black people right now are having the best, statistically, the best numbers that you’ve ever had, and it’s really an honor,” he said. “Nobody has done more for black people than I have. Nobody has done more.”

That was 27 February and Trump was also still claiming he had done an “incredible job” with the looming coronavirus pandemic. Now the virus has led 26 million Americans to file for unemployment. While the US Bureau of Labor Statistics will not release unemployment figures broken down by race until the beginning of next month, economists are certain that black Americans are suffering the brunt of Covid-19’s economic impact and will probably suffer the most dramatic consequences of the looming recession.

Coronavirus mask guidance is endangering US health workers, experts say

With crucial protective gear in short supply, federal authorities are saying health workers can wear lower-grade surgical masks while treating Covid-19 patients – but growing evidence suggests the practice is putting workers in jeopardy.

But scholars, not-for-profit leaders and former regulators in the specialized field of occupational safety say relying on surgical masks – which are considerably less protective than N95 respirators – is almost certainly fueling illness among frontline health workers, who probably make up about 11% of all known Covid-19 cases.

Spanish official apologises for spraying beach with bleach

Spain has apologised for spraying the local beach with diluted bleach in an attempt to protect residents from Covid-19.

The picturesque fishing village of Zahara de los Atunes sent tractors equipped with sprayers along part of its beach last week as officials readied for the release of the country’s children after six weeks of confinement.