Boris Johnson is in the hands of one of the country's most revered lung doctors, according to reports.
The Prime Minister has spent his second night in an intensive care unit at St Thomas' Hospital in central London - with his treatment being overseen by Dr Richard Leach, reports the Daily Telegraph.
The celebrated doc is senior clinician at Guy's and St Thomas' hospitals and has been at the PM's bedside.
Dr Leach's colleagues were full of praise for the physician when speaking to the newspaper last night.
"He's the most knowledgeable respiratory specialist in the country, and he's a straight talker," one said.
Mr Johnson has reportedly been given four litres of oxygen since being moved to ITU on Monday evening, having checked into the hospital the previous night.
He had been self isolating for 10 days in his Number 11 flat but with his condition deteriorating he was ordered by his doctor to go to hospital.
The Prime Minister had been diagnosed with the killer bug on March 27, with the hospital just a short drive from Downing Street across Westminster Bridge.
His breathing difficulties have since said to have improved, though staff who have worked alongside Dr Leach say the PM is in the best possible hands.
The doctor has worked at the hospital for 26 years and has an enviable knowledge of the respiratory system, having saved "thousands of lives".
He has been involved in creating five leading textbooks and in 2018 was made director of pulmonary and critical care medicine.
Dr Leach is understood to have taken overall responsibility for Mr Johnson's treatment, though sources told the Telegraph to not be under any illusions about how much of a hands-on role he would have - which will br taken by his colleagues.
The Prime Minister is, however, in a stable condition, Downing Street confirmed on Tuesday.
And while he has not yet been put on ventilation, it is expected that will be required at some stage.
Only 33 per cent of Covid-19 patients who are put on advanced breathing support, including ventilation, survive - according to data from the Intensive Care National Audit and Research Centre.
This compares to 84 per cent of those who need only basic support.
Professor Paul Hunter, an expert in infectious diseases at the University of East Anglia, meanwhile, has warned only around half of the virus patients who go into intensive care are surviving.
However, Dr Nathalie McDermott, a clinical lecturer at Kings College London, said she is a little baffled as to why the PM was even in intensive care if all he needed was standard oxygen therapy.
She said usually a patient in those circumstances would be in a High Dependency Unit, though admitted: "It's difficult to know."
Some patients remain on the intensive care units for three weeks, but the average stay is just seven days, but experts have said Mr Johnson is more susceptible to complications due to his age and sex.
