Internal party memo says ‘trust has been lost’ as US president reiterates threat of legal action against corporation

Trump to sue BBC – latest updates

Reform UK has pulled out of a BBC documentary about the party amid a row over the broadcaster’s editing of a Donald Trump speech.

The film, which was due to be called the Rise of Reform and would have been presented by Laura Kuenssberg, was being made by the independent production company October Films.

The company was involved in a Panorama documentary that led to the resignation of two of the most senior executives at the BBC, the director general, Tim Davie, and Deborah Turness, the chief executive of news.