The number of new coronavirus cases is the most registered in a single day since the peak of the deadly second wave earlier this year.
It was also announced that a further 22 people had died within 28 days of testing positive for Covid as of Thursday, bringing the UK total to 128,162.
Separate figures published by the Office for National Statistics show there have been 153,000 deaths registered in the UK where Covid was mentioned on the death certificate.
It comes as Boris Johnson today pledged to reveal details of what the end of lockdown restrictions will look like in the coming days.
The Prime Minister said it is “ever clearer” that vaccines are reducing deaths, despite increasing levels of infections involving the Delta variant of coronavirus.
He said he has increasing confidence he can go ahead with the final phase of his plans to end England’s lockdown on July 19 to “get back to life as close to it was before Covid”.
Meanwhile, government data up to June 30 shows that of the 77,909,177 Covid jabs given in the UK so far, 44,860,978 were first doses – a rise of 141,216 on the previous day.
Some 33,048,199 were second doses, an increase of 175,749.
The Mayor said that with more than nine million jabs administered the capital had “played its part” in the national effort but said he was doing all he could to maximise take-up over the next two-and-a-half weeks.
Mr Khan told the Standard: “We are throwing the kitchen sink, kitchen appliances and myself at this. We want to make sure we get as much coverage as we can.
“The target is we want two-thirds of Londoners to receive both jabs and every [adult] Londoner to have been offered at least one jab.
“I’m confident London will have played its part in making sure we can fully reopen on July 19. I think it’s important for us to fully reopen on July 19 – we are ready.”
Additional reporting by the Press Association.