The Labor leader’s comments came as Sir Keir told the audience how his father worked as a toolmaker and was a dedicated professional, this is where he said his belief in hard work and his desire to join the Labor Party was rooted. And in a backhand blow to Prime Minister Boris Johnson, Sir Keir suggested that his father Stanley Johnson could himself be considered a “toolmaker”.

He told the audience: “My father was a toolmaker.

“Although in a way Boris Johnson was too!”

Her comments drew loud applause as Deputy Labor Party leader Angela Rayner could be seen laughing.

It comes as Ms Rayner herself made a series of controversial comments about the Prime Minister at an event on the sidelines of the party conference on Saturday.

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Speaking at the event, Ms. Rayner hammered: “We can’t do worse than a bunch of scum, homophobic …

“Racist, misogynist, absolutely despicable …

“Banana Republic, dastardly, wicked, Etonian… lump of scum.”

She added that she had “held back a bit” with the comments which sparked furious calls for her to apologize, which she said will only happen when Mr Johnson apologizes for the comments made about the LGBTQ + and BAME communities.

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Sir Keir tried to fight back the cries by calling “usually the Conservatives heckle him”.

A protester was also excluded from the event by security shortly before the Labor leader began his speech as he sang “oh Jeremy Corbyn” and carried a Palestinian flag.

Starmer was even heckled over talking about his dying mother by another enraged audience member.

The Labor leader is using his speech to break with the Jeremy Corbyn era of work and will claim his party is “back to business”. It will be the most important political speech of his career and it will aim to show that Labor is capable of tackling the big issues facing Britain, including climate change and the recovery from the pandemic.