Boris Johnson has received a flurry of messages of support from MPs after being moved to intensive care as his coronavirus symptoms worsened.
The Prime Minister was admitted to St Thomas' hospital in Westminster on Sunday after his Covid-19 symptoms persisted for 10 days.
But, having been in hospital for tests and observation, it emerged on Monday night that his doctors advised he be admitted to intensive care.
MPs from across the political spectrum, world leaders and other official figures have spoken out to send Mr Johnson and his family messages of support after his condition deteriorated.
Chancellor Rishi Sunak tweeted: "My thoughts tonight are with Boris Johnson and Carrie Symonds.
“I know he'll be getting the best care possible and will come out of this even stronger."
Foreign Secretary Dominic Raab will “deputise where necessary” while he is in intensive care, a No 10 spokesman said.
The news came just a few hours after Mr Raab told a press briefing that the PM remained in charge of the Government despite remaining under observation.
Mr Raab later said there was an "incredibly strong team spirit behind" Mr Johnson and that ministers were determined to carry out his "direction".
"The Government's business will continue," he said.
"The Prime Minister is in safe hands with that brilliant team at St Thomas' hospital, and the focus of the Government will continue to be on making sure that the Prime Minister's direction, all the plans for making sure that we can defeat coronavirus and can pull the country through this challenge, will be taken forward."
He added: "There's an incredibly strong team spirit behind the Prime Minister, and making sure that we get all of the plans the Prime Minister's instructed us to deliver, to get them implemented as soon as possible.
The Conservative Party leader is understood to be conscious and has been moved to the ICU at about 7pm as a precaution should he require ventilation to aid his recovery.
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Two uniformed police officers were stationed at the entrance to the hospital on Monday evening.
Throughout the day officers and police vehicles could be seen entering and exiting the central London hospital.
