Boris Johnson is "responding to treatment" for coronavirus as he approaches a fourth night in hospital Downing Street announced on Wednesday.
At the daily briefing, chancellor,Rishi Sunak said Mr Johnson was now sitting up in bed and "engaging positively" with the clinical team at St Thomas' Hospital in London.
The prime minister was admitted to St Thomas' on Sunday, on the advice of his doctor, after continuing to have a cough and high temperature 10 days after testing positive for the virus. The prime minister was given oxygen before being taken to intensive care on Monday.
Downing Street said Mr Johnson was in "good spirits" on Wednesday as he continued to receive standard oxygen treatment. He has not had to be placed on a ventilator or non-invasive respiratory support.
The prime minister was being kept in St Thomas' Hospital in London "for close monitoring" and remained clinically stable, his official spokesman said.
Downing Street said he was not working but could contact those he needed to.
The number of people to die with the virus in UK hospitals has increased by a record 938 in a day taking the death toll to 7,097. There are now 60,333 cases confirmed according to the Department of Health.
No 10 said a review of lockdown rules will go ahead next week, but the public must "stick with" the measures at what is a critical time.
Meanwhile, the first patients have been admitted to the NHS Nightingale Hospital in east London.
The second NHS Nightingale Hospital in Birmingham will be opened on Friday at the National Exhibition Centre.It will have a capacity for up to 2,000 patients.
Support for UK Charities
Elsewhere,the chancellor unveiled a £750m funding package to keep struggling charities afloat during the pandemic.