US President Donald Trump airlifted to military hospital as Covid-19 puts election campaign on hold

Mr Trump was taken by helicopter to the Walter Reed National Military Medical Centre on Friday and is expected to remain there for "a few days".

A White House spokeswoman stressed that the hospital stay was "out of an abundance of caution" and that the 74-year-old would work from the hospital's presidential suite, which is equipped to allow him to continue his official duties.

Mr Trump walked out of the White House wearing a mask before boarding Marine One on Friday evening, and in a video on Twitter said: "I think I'm doing very well, but we're going to make sure that things work out."

Late on Friday, the president's physician Sean Conley said the president was doing "very well".

He added: "He is not requiring any supplemental oxygen, but in consultation with specialists we have elected to initiate Remdesivir therapy".

Mr Trump tweeted: "Going well, I think! Thank you to all. Love!!!"

The US has been left reeling by the unfolding events surrounding Mr Trump's health troubles, with the presidential election only four weeks away.

The president announced his diagnosis in a tweet in the early hours of Friday, following a positive test from one of his closest aides, Hope Hicks.

First lady Melania Trump has also tested positive and has a "mild cough and headache", according to the doctor, but the remainder of the first family, including son Barron, who lives at the White House, have tested negative.

The president's re-election campaign said all events featuring Mr Trump and members of his family would either be postponed or go online, but that vice-president Mike Pence would resume campaigning as he had tested negative.

Mr Trump's Covid-19 diagnosis is the latest among world leaders, with Brazilian president Jair Bolsonaro and the EU's chief Brexit negotiator Michel Barnier also falling ill.

Prime Minister Boris Johnson, who himself was admitted to intensive care after contracting coronavirus during the first wave of UK infections in spring, expressed his best wishes to Mr and

Mrs Trump, saying he was "sure that they will both stage a very strong recovery."

Meanwhile in the UK, Mr Johnson defended the current raft of local lockdowns and pleaded for patience in the struggle against the disease.

Liverpool, Warrington, Hartlepool and Middlesbrough became the latest regions to enter local lockdowns on Saturday, with it now illegal for households to mix indoors in those areas.

In an interview with the Telegraph, Mr Johnson called for people to be "patient" as the Government seeks to stifle a second wave of outbreaks.

More than a third of the UK population is living under heightened restrictions, and Mr Johnson has faced a revolt on his backbenches in recent days over the way ministers have introduced such local lockdowns without giving MPs a say.

But he said there was a "moral imperative" to bring in life-saving measures during what he called a "once-in-a-century event".

Addressing the unpopularity of the 10pm pub curfew and other social restrictions, the Prime Minister told the paper he sympathised "with people who chafe at the restrictions".

He added: "I think everybody is fed up - I just urge people to be a little bit patient.

"We will get through it and we will save a load of lives, and that's really the best I can say.

"I think there is a moral imperative to save life where you can."

In an interview with BBC North East and Cumbria on the eve of the "virtual" Tory conference, Mr Johnson appeared to blame the public for the current surge in cases.

He said the summer had brought with it a "sort of fraying of people's discipline and attention" to the social distancing rules.

His comments come as yet more university students tested positive, with Northumbria University, based in Newcastle-upon-Tyne, saying that as of Friday it was aware of 770 cases, 78 of whom are symptomatic.

New figures showed the reproduction number, or R value, of coronavirus transmission across the country still remains above 1, and is continuing to creep up.

The data released by the Government Office for Science and the Scientific Advisory Group for Emergencies (Sage) shows the estimate for R for the whole of the UK - the rate at which the virus is spreading - is between 1.3 and 1.6. Last week, the R number was between 1.2 and 1.5.

Westminster continued, meanwhile, to be embroiled in its own coronavirus controversy as the Metropolitan Police announced it was investigating Margaret Ferrier MP for alleged law breaches after she took a train from London to Scotland knowing she had tested positive.

The Met said it is "conducting an investigation into potential offences" with the British Transport Police.

The probe comes after SNP leader Nicola Sturgeon said she had made it "crystal clear" to Ms Ferrier, who has been suspended from the party, to quit as an MP after she made a "monumental" error of judgment.