Panorama - Immigration: How We Lost Count

It's impossible to know how many immigrants enter Britain illegally, but does the government know how many enter lawfully? Government figures claim the population of Slough is falling, but the council claims the opposite is true. 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.