 In 1986, an Iranian man was sent back to Paris, from London, as he was unable to present any ID to British immigration officers.He stayed at the airport for nearly twenty years and his story was made into a film, "The Terminal".A 2012 study carried out by the University of Oxford's Centre on Migration, Policy and Society (COMPAS) has estimated that there were 120,000 irregular migrant children in the UK, of whom 65,000 were born in the UK to parents without legal status.