"It is wrong for the president to have done this," the spokesman for British Prime Minister Theresa May said.
"Britain First seeks to divide communities through their use of hateful narratives which peddle lies and stoke tensions. They cause anxiety to law-abiding people."
Reuters was unable to immediately verify the videos and Fransen herself said they had come from various online sources which had been posted on her social media pages.
But May did not rescind her invitation of a state visit, despite demands to do so from MPs angry at Trump's publicizing of the Britain First group and his erratic behavior.
Britain, facing a £50bn "Brexit bill", is reportedly desperate to secure a new U.S. trade agreement with Trump to help make up for the impending loss of access to European markets.