Four young British Muslims in their twenties - a social worker, an IT specialist, a security guard and a financial adviser - occupy a table at a fast-food chicken restaurant in Luton. Perched on their plastic chairs, wolfing down their dinner, they seem just ordinary young men. Yet out of their mouths pour heated words of revolution. "As far as I'm concerned, when they bomb London, the bigger the better," says Abdul Haq, the social worker. "I know it's going to happen because Sheikh bin Laden said so. Like Bali, like Turkey, like Madrid - I pray for it, I...