Philippa Roxby
Health reporter, BBC News

Image source, PA Media

People have been less likely to leave their homes to socialise since the "rule of six" was introduced in its various forms across England, Wales and Scotland.

A survey of nearly 2,000 people by the Office for National Statistics near the end of September has suggested that 20% of adults went out to meet friends or family, compared with 30% the week before.

There were also reductions - although smaller ones - in the percentage of people eating or drinking in a restaurant, cafe, bar or pub.

Just four in 10 adults said they were comfortable eating indoors in a restaurant when asked between 24 and 27 September.

"Rule of six" measures came into place 10 days before to help reduce the spread of Covid-19, with guidance on the rules varying across the UK nations.

The ONS survey also suggests extra restrictions in force in many areas of the UK are having the desired effect by putting people off socialising.

Some 37% of those in local lockdown areas had not mixed with anyone outside their household, compared with 22% of people in the rest of the country.

But people are more anxious than they have been since the end of May – three-quarters said they were worried about the effects of Covid-19 on their life right now.

When Donald Trump tweeted that he'd been diagnosed with coronavirus, US networks were already covering news about his advisor, Hope Hicks, testing positive.

Here's a look at some of their reactions when the news broke.

Image source, Getty Images

White House officials have been speaking to reporters - largely on condition of anonymity - about the mood in the administration following the president's diagnosis.

"People would be lying if the say they aren't concerned," one senior administration official told CBS News. "You will likely see more masks around here."

Another official said staff "expected" a top figure would eventually get the virus, but "nobody expected it to be [the president]". They said it couldn't be blamed on a lax use of masks and social distancing, but acknowledged "some behaviour will change".

Another senior official said situation in the White House was "crazy", but stressed that all staff in proximity to the president were tested daily.

US media are reporting that Covid-positive President Trump has cancelled his only scheduled event on Friday as he and the first lady isolate in the White House.

The event was set to be a phone call on Covid-19 support to vulnerable older people.

Here are the latest graphics illustrating the coronavirus situation in the UK:

London's Metropolitan Police and the British Transport Police have confirmed they are investigating Scottish National Party MP Margaret Ferrier after she returned to Scotland by train from London knowing she had tested positive for Covid-19.

As we reported earlier, the Rutherglen and Hamilton West MP initially travelled to Westminster from Glasgow having developed coronavirus symptoms before then returning by train.

A Met Police statement said an MP had contacted Police Scotland on Thursday to report she may have breached Covid-19 guidance in relation to a train journey on Tuesday after a positive test.

It said: "Following consultation with Police Scotland, officers from the Metropolitan Police, working with British Transport Police, are conducting an investigation into potential offences.

"The Parliamentary Commissioner for Standards has been informed."

Republican Senator Mike Lee - a member of the committee that will oversee the appointment of the next US Supreme Court justice - says he has tested positive for Covid-19.

The Utah senator said he had been tested several days ago while visiting the White House, and the result came back negative at the time.

"Like so many Utahns, I will now spend part of 2020 working from home," he added.

Last week Presidential Donald Trump nominated Amy Coney Barrett, a favourite of social conservatives, to fill the vacancy in the US's top court which came about following the death of Ruth Bader Ginsburg.

Lee met Barrett on Tuesday as she visited lawmakers on Capitol Hill. The judge has tested negative for coronavirus and she is following government guidelines on social distancing, the White House says.

A friendly reminder to those travelling to or from the UK in the near future, that from 04:00 BST on Saturday, quarantine restrictions will apply to people entering the UK from Turkey and Poland.

No new countries are being added to the UK's list of safe countries this week, but the fine for repeatedly breaking the self-isolation rules in England has been increased to £10,000.

To see the full list of quarantine countries, click here.

Image source, Reuters

If you've been on social media today, you've probably seen many rumours floating around.

There have been false claims that the president called the virus a "hoax", that a military "doomsday plane" was launched and even speculation - without evidence - that President Trump faked his coronavirus diagnosis.

The BBC's Anti-Disinformation unit has investigated each of these rumours - you can find out what we know here.

Democratic presidential candidate Joe Biden has said both he and his wife have tested negative for coronavirus.

A statement issued by the couple's doctor said they underwent testing on Friday morning.

Biden and Trump, who has tested positive for the virus, took part in the first presidential debate of the campaign on Tuesday night.

During the debate, President Trump mocked his opponent for wearing masks on the campaign trail.

"I don’t wear masks like him,” Trump said of Biden. “Every time you see him, he’s got a mask. He could be speaking 200 feet away from them, and he shows up with the biggest mask I’ve ever seen.”

Biden's running mate, Kamala Harris, will debate Vice President Mike Pence in an event on 7 October. Both have tested negative for coronavirus since Trump's diagnosis.

UK Prime Minister Boris Johnson has rejected a call by Welsh First Minister Mark Drakeford to ban people travelling from Covid hotspots in England to Wales.

People living in locked down areas of Wales can only leave with a "reasonable excuse" but there is no equivalent rule elsewhere in the UK.

It means people from locked down areas of England can holiday anywhere in Wales not under local restrictions. However the prime minister said he did not want to introduce limits on travel.

Image source, EPA

The recent spike in coronavirus cases in the UK is a result of a "fraying of people's discipline" over the summer, Prime Minister Boris Johnson has said.

He said compliance with the virus restrictions had been "high at first" but then "everybody got a bit, kind of complacent and blasé".

Cases have increased sharply across the UK since the end of August.

The prime minister, who has been speaking to journalists from around the country, denied that a lack of testing in north-east England had caused the virus to get out of control in the region.

"That's not the reality… the nation came together in March and April, what happened over the summer was a bit of sort of fraying of people's discipline and attention to those rules," he said.

Image source, Reuters

Donald Trump’s former personal lawyer Michael Cohen - who has served a jail term for Trump campaign finance violations, among other crimes - has been weighing in on the situation to the BBC's Suzanne Kianpour.

"This whole situation is tragic in that this was all preventable," Cohen says of his ex-boss, with whom he has had a very public falling out.

"What makes Trump reckless is that he has access to the greatest, unlimited medical attention. Proper testing could have avoided all of this for him and others. Trump is now Covid-positive because of ignorance and arrogance.”

A little earlier we heard from White House chief of staff Mark Meadows, who said that all "core members" of the Trump administration had been tested for coronavirus, and all results were negative.

He didn't specify who he was talking about, but since Donald Trump's diagnosis, several members of his cabinet have declared themselves free of Covid-19:

• Vice President Mike Pence
• Secretary of State Mike Pompeo
• Treasury Secretary Steve Mnuchin
• Alex Azar, Secretary of Health and Human Services
• Attorney General William Barr

That leaves 17 more cabinet members who've yet to speak publicly on their test results, including the secretaries of defence, energy, and the director of the Central Intelligence Agency.

If you're just joining us you'll be aware of the big developments in the US, but there have also been some important stories coming out of the UK:

• Prime Minister Boris Johnson has sent his regards to President Trump and the first lady, after the couple tested positive for coronavirus, wishing them a "speedy recovery".
• MP Margaret Ferrier has been facing calls to resign after she admitted yesterday that she had travelled from London to Scotland on public transport despite knowing she had the virus.
• On Friday, testing of people with symptoms detected 6,968 new cases of the virus in the UK., external This is similar to yesterday and down slightly on previous days, but way below the number at the peak of the pandemic.
• An ongoing study by the Office for National Statistics suggests new infections may be increasing more slowly than in previous weeks. However, both the ONS and government scientific advisers have urged caution.
• And finally, the loss of a sense of smell may be a more reliable indicator of Covid-19 than cough or fever, research suggests. A study by University College London of 590 people who lost their sense of smell or taste earlier in the year found 80% had coronavirus antibodies.

Image source, PA Media

News from the English city of Newcastle now, where some 770 students at Northumbria University have tested positive for Covid-19.

A spokesperson for the university said 78 of the affected students were showing symptoms.

"These students are all now self-isolating. Their flatmates and any close contacts are also self-isolating for 14 days in line with government guidance and have been advised to book a test as soon as possible should symptoms appear," the university said.

Students across the UK are self-isolating after several outbreaks of coronavirus hit university communities.

Reality Check

Image source, Reuters

The US president's positive Covid-19 test has led to inevitable questions about the presidential election on 3 November, and about what would happen if he was incapacitated. There's no suggestion that things are that serious, but they're certainly questions at the front of many people's minds.

Although Vice-President Mike Pence would be in line to assume presidential duties if Mr Trump became unable to act as president, Mr Pence wouldn’t necessarily be the Republican party’s candidate as it has already officially nominated Mr Trump.

Under the party’s rules, the 168 members of the Republic National Committee (RNC) would have to vote to elect a new presidential nominee, with Mr Pence one of the likely candidates.

If he was chosen, the party would then have to select a new running mate. Neither the Democrats nor the Republicans have ever replaced their presidential nominee after officially selecting them.

Read more: What if Trump became too ill to be president

Tara McKelvey
BBC News, The White House

Here at the White House, all the officials are wearing masks this morning, a departure from the way things have been in recent days.

They had maintained a sense of normalcy here, even while workers in other parts of the city masked up. The White House officials were reinforcing the president’s message that the country had turned a corner.

Today, though, the president’s public events have been cancelled, and he is quarantined. The faces of officials, partly hidden behind masks, look anxious as they speed-walk through hallways.

Journalists, too, are uneasy: Six are lined up behind me as we wait to get tested.

“Have you had any symptoms this morning?” a medical worker asks. He is standing in a cubicle cluttered with hand sanitiser bottles and boxes of coffee grounds.

Ten quick swabs and I am sent on my way. He and his colleagues are doing their best to ensure the virus does not spread any further than it already has, and we are all hoping for the best.

In the UK, the coronavirus lockdown caused "heartbreaking" suffering to many but also gave people a "glimpse" of a new and different world with less pollution and more social cohesion, the leaders of the Green Party of England and Wales have told their annual conference.

Jonathan Bartley and Sian Berry said the virus had exposed just how unequal the country was and how its economic system was "not fit for purpose".

Mr Bartley said that during the nationwide lockdown, businesses had demonstrated they could adapt to new ways of operating, communities "came together in solidarity", the value of key workers was properly recognised, rough sleepers were taken off the streets and tenants were protected from eviction.

"We saw a different world might be possible in lockdown... we had a glimpse of something new," he added.

Ms Berry said the £1tn in investment the Greens called for at last year's election to build a more sustainable economy and to allow the UK to go carbon neutral by 2030 was needed even more now.

Read more from the Green Party conference here.

Image source, EPA

Donald Trump's diagnosis comes after a hectic week running his administration and campaigning ahead of the 3 November election - during which time he has interacted with many high-level officials.

From meeting his new Supreme Court pick and taking the stage with Joe Biden for their first presidential debate, to attending rallies across the country, the president has been a busy man. Check out our guide to where Trump was and who he was within the last few days.