Anti-fascist protesters rallied outside the BBC's west London studios on Thursday ahead of a white-supremacist party leader's appearance on a leading political debate show.
British National Party chief Nick Griffin is scheduled to be a panelist on the TV program "Question Time" - a first for the far-right party. Justice Secretary Jack Straw, a senior member of the governing Labour Party Cabinet, is due to appear on Thursday's show alongside Griffin.
Many politicians have condemned the invitation to Griffin, but the BBC says that as a publicly funded broadcaster it must cover all political parties that have a national presence.
The whites-only BNP opposes immigration and claims to fight for "indigenous" Britons. Griffin has a conviction for racial hatred and has denied the Holocaust in the past.