London Mayor Sadiq Khan has reportedly warned Boris Johnson that the capital needs new coronavirus restrictions as soon as possible to curb the spread of Covid-19.
The Mayor is also said to be preparing to urge people to work from home if possible, despite the government's push to get people back to their offices.
Insiders said London is no longer two weeks behind hotspots like the North East and Greater Manchester, but is instead “two or three days behind”.
Mr Khan is said to be pushing for 10pm curfews on pubs and a ban on mixing households in a bid to stop the spread of coronavirus.
The mayor has reportedly said the capital needs new restrictions to be introduced by as early as Monday.
A Mayoral source told The Huffington Post : “It’s clear that cases in London are only moving in one direction, we are now just days behind hotspots in the North West and North East.
“We can’t afford more delay. Introducing new measures now will help slow the spread of the virus and potentially prevent the need for a fuller lockdown like we saw in March, which could seriously damage the economy once again.”
Mr Khan and city officials are reportedly worried about the rapidly changing situation in the city.
The R rate - the average number of secondary coronavirus infections produced by a single infectious person - is now above 1 in both London and other parts of the UK.
This means the pandemic is accelerating and cases are at risk of spiralling out of control.
The news comes as the Prime Minister warned that the UK is “now seeing a second wave coming in” and that it was “inevitable” that coronavirus would hit the country again.
Boris Johnson said a second national lockdown was the "last thing anybody wants" but that current measures would need to be kept "under review".
On Friday, Sadiq Khan said he held an emergency meeting with London council leaders, the Government and Public Health England to discuss the next steps.
He said "it is increasingly likely that, in London, additional measures will soon be required to slow the spread of the virus."
The Mayor added: "The Prime Minister has said that we are now seeing the start of a second wave of Covid-19 across the UK.
"Londoners should also know that I am extremely concerned by the latest evidence I’ve been seen today from public health experts about the accelerating speed at which Covid-19 is now spreading here in London.
"This is made worse by the uncertainty caused by the lack of testing capacity in the capital."
Speaking in Oxfordshire, the Prime Minister said: "On Monday we brought in the measures that we did, the 'rule of six', to really try and restrict what people are doing and to bring in a new buffer - and to make it absolutely clear, the 'rule of six': indoors six maximum, six outdoors maximum.
"But the crucial thing is at the same time to observe the basic rules on social distancing - hands, face, space - that is what everybody has got to do if we want to continue to beat this thing.
"But as we look at this particular curve and what is happening now, clearly we are going to keep everything under review. I don't want to get into a second national lockdown at all, it is the last thing anybody wants.
"I don't want to go into bigger lockdown measures at all, we want to keep schools open and it is fantastic the schools have gone back in the way they have.
"We want to keep the economy open as far as we possibly can, we want to keep businesses going.
"The only way we can do that is obviously if people follow the guidance."
A further 4,422 coronavirus infections were recorded in the UK on Saturday as fears of a second lockdown mount.
It is the highest number of daily coronavirus cases recorded since May 8.
As of Saturday, the total number of people who have tested positive for Covid-19 are 390,358, according to Government figures.
The death count has increased by 27, reaching a tragic total of 41,759.