As France tries to come to terms with the deaths of the 12 people murdered in the Islamist attack at the office of Charlie Hebdo magazine in Paris, Panorama investigates the battle for the hearts and minds of British Muslims. John Ware hears from Muslims facing an angry backlash for trying to promote a form of Islam which is in synch with British values. They believe that the way Islam has been practised here has more in common with extremist ideologies than some police officers, politicians or Muslim leaders have been prepared to admit.