The far-right party has said that a lorry containing 60,000 copies of The Voice of Freedom has been seized at Dover, after being printed in Eastern Europe.
Kent Police said that it was alerted by customs officers after the newspapers were found during a random check and that an investigation has been launched into the content of the publication.
The paper was previously printed by Saudi Arabian-owned Satellite Graphics, an Essex-based firm specialising in printing Muslim, Arabic and Asian newspapers.
However, BNP spokesman Dr Phill Edwards said that following media coverage the printer resigned the account. "They wouldn't print it anymore thanks to the Sunday Telegraph expos," he said.
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