Morning Extra - 19/05/2009

Should the House of Commons Speaker go - or was his apology enough? Michael Martin says he's "profoundly sorry" for the way he's overseen the handling of MPs' expenses and has admitted the public had been let down "very badly indeed". Is the Speaker being made, unfairly, a scapegoat for the real villians? Or does he need to go to save the reputation of Parliament? Graham Stewart takes your calls, texts and emails.