There’s never enough time or people to search every lorry coming into Britain from the Continent. Immigration Officer John Cassidy explains the role of the ‘Spotters’ who picks out which lorries should be searched. On an average day they can find up to 40 clandestines. Today is unusual because they’ve been searching lorries all night, with their CO2 tubes and sense of smell, apparently clandestines who live rough have a very noticeable ‘aroma’. Eventually, as daylight breaks they make a discovery. Five Iraqis are found onboard a lorry. They are later released back outside the port to try again another day.