Morning Extra - 21/05/2009

How should society treat the BNP? An elected BNP member of the London Assembly, who's been invited to a Buckingham Palace garden party hosted by the Queen, says he intends to bring his party's leader Nick Griffin — a convicted criminal — along with him. Should he be denied this opportunity? London Mayor Boris Johnson says that Richard Barnbrook "must either bring a guest who will not provoke political controversy, or consider his invitation rescinded". Is the BNP just another party, or are their views on certain subjects so far from the mainstream that they must be treated differently? Graham Stewart takes your calls, texts and emails.