By Claire Elicott Whitehall,Editor

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Keir Starmer is set to criticise recent protests inspired by Tommy Robinson, warning ‘you don’t need to be a historian to know where that kind of poison can lead’.

In a speech at a conference for progressive politicians, the Prime Minister will urge against far-Right attempts to cast the UK as in a ‘violent struggle’.

He will say the language used at the Unite The Kingdom march that brought tens of thousands to central London two weeks ago was ‘naked in its attempt to intimidate’ and said there could be ‘difference under the same flag’.

Warning against nationalism, Sir Keir is set to directly criticise the march inspired by former football hooligan Robinson and at which Tesla founder Elon Musk made a surprise appearance.

He will speak alongside other world leaders including Australian Prime Minister Anthony Albanese, and Canadian Prime Minister Mark Carney at the Global Progressive Action Conference in London on Friday.

Focusing on immigration, he will make the case that left wing politicians have to be unafraid to confront real world problems.

He will argue that making the case for illegal migration ‘is not compassionate left-wing politics’.

Campaigners who think of themselves as progressive must look themselves ‘in the mirror’ and identify areas where they have allowed themselves ‘to shy away from people’s concerns’, he will add.

‘For too many years it’s been too easy for people to come here, slip into the shadow economy and remain here illegally,’ he will say.

‘It is not compassionate left-wing politics to rely on labour that exploits foreign workers and undercuts fair wages. But the simple fact that every nation needs to have control over its borders.’

The PM will say the march was motivated by ‘an industrialised infrastructure of grievance’ which exploits real world problems.

‘And, at its heart – its most poisonous belief – on full display at the protests here in London, just a week or two ago, that there is a coming struggle, a defining struggle, a violent struggle, for the nation. For all our nations,’ he is set to say.

‘Now – you don’t need to be a historian to know where that kind of poison can lead. You can just feel it. A language that is naked in its attempt to intimidate.’

It comes after protests during the summer near hotels housing asylum seekers and a campaign to raise the flag of St George spread throughout the country.

Sir Keir is expected to describe a choice between ‘a politics of predatory grievance, preying on the problems of working people’ and ‘patriotic renewal, rooted in communities, building a better country, brick by brick, from the bottom up, including everyone in the national story’.

The Centre for American Progress Action Fund, think tank Labour Together and the Institute for Public Policy Research are hosting Friday’s summit.

It came as Sir Keir said Donald Trump’s claim this week that London ‘wants to go to sharia law’ is ‘ridiculous nonsense’.

And he defended his friend, London Mayor Sadiq Khan, who the US president called ‘terrible’ in a speech to the United Nations.

The PM told BBC London: ‘What the President said about the Mayor, who’s doing a really good job, in fact driving down serious crime, what he said about the introduction of sharia law was ridiculous nonsense.’

Asked in another interview with ITV London whether he will ‘call out’ Mr Trump on these comments when he next speaks to him, Sir Keir said: ‘Of course.. We have a frank conversation about many, many things.

‘But I want to express my support for our mayor, Sadiq Khan. We’re very proud to have a Muslim in our diverse city.’

But asked whether he agrees with Mr Khan that Mr Trump is ‘racist, sexist and Islamophobic’, the Prime Minister said: ‘I’m not going to get drawn into a war of words.’