The Government has no idea how many immigrants enter Britain illegally but how many enter lawfully? Panorama went to the immigration hotspot of Slough - where Government figures claim the population is falling. But with new arrivals pitching up daily, the council there says the opposite's true and that as a result, it simply can't balance its books. Richard Bilton reports on the school where one class has had 40 per cent turnover of pupils and hears from some of Slough's immigrants who say it's time to call a halt.
