A video has emerged showing an airline passenger being restrained by an immigration officer. The man was on board the Turkish Airlines flight from London Heathrow to Istanbul. He can be heard saying that he is an Afghani asylum seeker being deported to Afghanistan. Ahtzaz Ali, who recorded the video, said the man became agitated before the flight took off. He reported the man was slapped and pushed by the officer before being removed from the flight. The cabin crew attempted to stop Ali from recording the incident, he says.  A Home Office spokesman said it did not comment on individual cases.