In a statement released today, he revealed new measures will soon be required to contain the outbreak.
He said: “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 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.
“It is increasingly likely that, in London, additional measures will soon be required to slow the spread of the virus.
“We will be considering some of the measures which have already been imposed in other parts of the UK.”
He also urged Londoners to be cautious and maintain social distancing measures where possible.
More to follow…