British postal workers in Lancashire are threatening to strike if they are told to deliver free copies of the Sun next week in protest against its coverage of the Hillsborough tragedy.
Union members at the Royal Mail depot in Skelmersdale, near Liverpool, have vowed to walk out if "any copies of the Sun cross the gates".
In a statement given to the Liverpool Class Action website, they called the newspaper "s***e".
The newspaper is delivering 22 million free World Cup editions around the country on Thursday and Friday.
The Sun is still reviled in parts of Merseyside and among Liverpool fans for its coverage of the Hillsborough disaster.