Momentum has banned journalists at The Sun from attending The World Transformed event in Liverpool next week.
The event is set to take place alongside the Labour Party conference in the city and the group has decided to ban journalists at the newspaper from attending the event.
In a tweet, that has since been deleted, Matt Dathan from The Sun accused Momentum of being “supporters of press censorship”.
“Sorry to see the @PeoplesMomentum has banned The Sun from attending its World Transformed conference next week. Didn’t realise they were supporters of press censorship…”
Other journalists have also spoken out against Momentum’s decision, with Heather Stewart, Political editor at the Guardian, calling it “outrageous.”
“This is outrageous - banning journalists because you don’t like their paper’s editorial line smacks more of Donald Trump than the lovely open, democratic social movement Momentum aspires to be,” she tweeted.
While Dan Hodges, Commentator for the Mail on Sunday, also criticised their actions.
In a tweet, he said: “Worth noting the Momentum supporters who are applauding this ban are the same people who were up in arms at the IHRA’s supposed impact on free-speech.”
In a statement, Momentum said it was backing a long-running boycott of the newspaper in the city, after the title had “smeared” Liverpool fans in wake of the Hillsborough disaster.
Talking to Politics Home, a spokesperson said: "This year's festival is in Liverpool where there is a 23-year-long campaign to boycott the Sun after they smeared Liverpool fans in the wake of the Hillsborough disaster, falsely claiming that they 'picked pockets of victims', 'urinated on brave cops' and 'beat up PCs giving the kiss of life'.
"We stand with the people of Liverpool and all of the families who lost loved ones in the disaster and are still fighting for justice. This is why the boycott of The Sun extends to The World Transformed."
The Sun came out and apologised for its Hillsborough coverage in 2012, saying it was “without doubt the blackest day in the newspaper’s history”.