Mr Khan said in a written statement: “London is at a very worrying tipping point right now. We are seeing a sharp increase in the number of calls, hospitalizations and intensive care patients.
“The near collapse of tests and traces and the resurgence of the virus meant that further measures to slow its spread were badly needed.
“Testing capacity has been diverted from London over the past two weeks to other national hotspots, and weekly figures are now down 43% in the capital since mid-August.
“The lack of testing capacity is totally unacceptable and that is why London has been added to the government’s coronavirus watchlist as a matter of concern.
“Ministers just need to be in control. It is essential that testing capacity is increased immediately in London and focused on the areas that need it most.
“Any delay will mean abandoning the city and costing lives.”
The UK on Thursday announced 6,634 new cases of COVID-19 – the highest figure on record in a single day since the start of the pandemic.
The massive spike came after 6,178 infections were added to the tally on Wednesday, with cases in London more than doubling since August.
Earlier this week, Kevin Fenton, director of Public Health England in London, held a meeting with Mr Khan and leaders of the city’s 32 boroughs.
He pointed to the increase in hospital admissions and the growing number of 111 calls as evidence Londoners had a serious epidemic on their hands.
Professor Fenton has even gone so far as to suggest that the outbreak in the city could be as severe as the one in the northeast.
He said London lost around 20% of its testing capacity as it was moved from the city to other hot spots.
The latest development comes after disturbing new data revealed that England’s estimated number of coronavirus cases jumped 60% in one week.
The Office for National Statistics (ONS) infection survey found that there were around 9,600 new coronavirus infections per day in England, up from 6,000 the week before.
The survey, which tests thousands of people living in English homes whether they show symptoms or not, also found 103,600 people had coronavirus from September 13 to 19, or about one in 500 people.
The ONS said: “The estimate shows that the number of infections has increased in recent weeks.
“In recent weeks, there has been clear evidence of an increase in the number of people testing positive for Covid-19 across all age groups, with current rates highest in the 17 to 17 age group. 24 years.
“There is evidence of higher infection rates in the North West, Yorkshire and the Humber, London and the North East. ”
It’s a story of rupture. More soon…