Six people have been arrested as anti-fascist protesters demonstrating against BNP leader Nick Griffin's appearance on Question Time broke through a security cordon outside BBC Television Centre.
About 25 protesters gained entry to the reception area of the building in White City, west London, as more than 500 people demonstrated prior to filming of the political debate show.
Following the recording, a spokesman for BBC journalism said the programme had covered a "wide range of issues", including race, freedom of speech, and whether Question Time had given the BNP "an early Christmas present".
"In particular there were lively exchanges on topics such as whether the BNP had hijacked Churchill, on the panel's views of Islam and whether the rise of the BNP is the result of the Government's immigration policy," the spokesman said.
"The programme will demonstrate that the audience were able to provide strong scrutiny of all the panel members and what they stand for. A full audience attended the making of the programme and there were no protests in the studio."
Mr Griffin, 50, shared the platform with Justice Secretary Jack Straw, Tory peer Baroness Warsi, Liberal Democrat home affairs spokesman Chris Huhne and writer Bonnie Greer.
The Metropolitan Police said there were six arrests at the protest, on suspicion of offences including violent disorder, causing actual bodily harm, assault of a police officer and a person wanted on warrant.
A London Ambulance Service spokesman said three people were treated and discharged for minor injuries during the protest.
A Scotland Yard spokesman said three police officers were injured, one of whom was treated by paramedics for head injuries but did not require hospital treatment.
