Donald Trump has attacked the NHS, tweeting that it is "going broke and not working", causing Jeremy Hunt and other UK politicians to angrily respond.
He wrote: "The Democrats are pushing for Universal HealthCare while thousands of people are marching in the UK because their U system is going broke and not working.
"Dems want to greatly raise taxes for really bad and non-personal medical care. No thanks!"
The tweet appears to refer to marches asking for more funding for the NHS which took place at the weekend, organised by anti-privatisation groups.
Health secretary Jeremy Hunt responded: "I may disagree with claims made on that march but not ONE of them wants to live in a system where 28m people have no cover.
"NHS may have challenges but I’m proud to be from the country that invented universal coverage - where all get care no matter the size of their bank balance."
I may disagree with claims made on that march but not ONE of them wants to live in a system where 28m people have no cover. NHS may have challenges but I’m proud to be from the country that invented universal coverage - where all get care no matter the size of their bank balance https://t.co/YJsKBAHsw7— Jeremy Hunt (@Jeremy_Hunt) February 5, 2018
Theresa May backed her health minister's comments, and a spokesperson said she is proud of the NHS.
The spokesperson said: "The prime minister is proud of having an NHS that is free at the point of delivery.
"NHS funding is at a record high and was prioritised in the Budget with an extra £2.8 billion. In the recent Commonwealth Fund international survey, the NHS was rated the best int he world for a second time.
"Jeremy Hunt is the health secretary and of course he speaks for the government on these matters."
Jeremy Corbyn weighed in, tweeting: "Wrong. People were marching because we love our NHS and hate what the Tories are doing to it. Healthcare is a human right."
Hey, Britain here. Literally nobody here would ever want to trade our National Health Service for what America has. https://t.co/RQD0fIlMEV— James O'Malley (@Psythor) February 5, 2018
Other MPs tweeted their derision, including Labour's David Lammy who called the President an "absolute prat."
He said: "Oh do put your phone down you absolute prat. Healthcare in this country is a human right and millions of us will defend it until our dying breath."
Tory MP Sarah Wollaston added: "No, @realDonaldTrump, people are marching to demonstrate their support for the #NHS & argue for more funding."
Labour MP Stephen Doughty tweeted: "Now #Trump @realDonaldTrump exposing again his utter ignorance about #Britain - this time on our proud #NHS - exactly opposite to what he’s doing in US."
Luke Pollard MP pointed out: "No, people in the UK protested because they don’t want an American system like you have."
This should help smooth things out over that presidential visit https://t.co/AIAutagoez— Tom Bateman (@tomb8man) February 5, 2018
We're allowed to insult the NHS but you're not. https://t.co/Ngga5yUGkR— Louise Adams (@Shladams) February 5, 2018
Some have speculated that Mr Trump made the comments after perhaps watching Nigel Farage appear on Fox And Friends.
On the show, which the President tweeted about after making his NHS comments, Mr Farage said: "We have a population of 65 million but it's increasing by half a million people a year. We just haven't got enough hospitals, we haven't got enough doctors, we haven't got enough facilities.
It was only a matter of time...'The Donald' crashes into the NHS crisis debate https://t.co/Kx0IHGJlmg— Alastair McLellan (@HSJEditor) February 5, 2018
"The National Health Service has turned into the International Health Service and we're providing a lot of healthcare for people coming into Britain from all over the world. We do need some absolutely fundamental reforms. This system we have was set up in 1948. Surprisingly for a state-run thing for most of the first fifty years the public had great faith in it. Right now it's pretty much at breaking point."
Donald Trump is now using @NHSEngland as an example of the failure of Universal Healthcare. Over to you @Jeremy_Hunt @theresa_may @jeremycorbyn https://t.co/hGQL7OY1Wr— Jason Elsom (@JasonElsom) February 5, 2018
The President has previously said he is ready to apologise to the UK for his actions on Twitter, after retweeting fake news shared by far-right group Britain First and criticising Theresa May.
At the time he tweeted to the Prime Minister: "don't focus on me, focus on the destructive Radial Islamic Terrorism that is taking place within the United Kingdom. We are doing just fine!"