Sir Keir Starmer has revealed he told one of his frontbench MPs to immediately delete a tweet linking to another post accusing Boris Johnson of “recreating Nazi Germany” with Brexit Britain.
Bill Esterson - the shadow international trade minister - had tweeted: "My dad’s family is Jewish.
"We have no idea how many of our relatives were murdered in the Holocaust.
“I fear Johnson’s actions are leading us to a very dangerous place.”
The MP for Sefton Central had been responding on Twitter to another post which made the Nazi Germany comparison.
Tory Party chairperson Amanda Milling immediately slammed the post by one of one of Labour’s senior MPs.
Ms Milling said: “It’s an outrageous insult to all those who suffered at the hands of the Nazis and offensive to those who voted to leave the EU.
“As usual Labour are out of touch with the British people. Will Keir condemn?”
Speaking on LBC presenter Nick Ferrari’s show, the Labour leader confirmed his office had ordered Mr Esterson to immediately delete the tweet.
Sir Keir added he had told his MPs to “stay off Twitter.”