The whole programme was a chance for the other political parties to attack the BNP & hopefully win the voters support. It never addressed the real problems because everything was aimed at setting up Nick Griffin to take a kicking. The PR guys from the Labour party must be cringing after Jack Straw's bumbling display, he couldn't put together an answer without stumbling over his words I'm not really sure it did much damage to the BNP, only time will tell.
By the way, if the BNP used their "indigenous" people theory, would that mean the Royal family would have to pack their bags?