Foreign Secretary Dominic Raab has said he is "confident" Boris Johnson will recover from coronavirus, describing the prime minister as a "fighter", APA reports citing BBC.
Speaking at the daily coronavirus briefing, Mr Raab said Mr Johnson remained in "good spirits" and was breathing without assistance.
He also described the PM as not only a colleague - but "also a friend".
The Queen has sent a message to Mr Johnson's family and pregnant partner, saying they are in her thoughts.
Speaking at the daily coronavirus briefing, Mr Raab, who is deputising for the PM, said: "All of our thoughts and prayers are with the prime minister at this time, with Carrie and with his whole family.
"And I'm confident he'll pull through because If there's one thing I know about this prime minister: he's a fighter. And he'll be back at the helm, leading us through this crisis in short order."
It comes as the number of coronavirus hospital deaths in the UK rose to 6,159 - a record increase of 786 in a day, the Department of Health and Social Care said, compared with 439 on Monday.