 The officer will briefly interview all arriving people who are not British Citizens or EU nationals, check their document for alterations or forgery, verify any entry clearances held, assess their travel history against the stamps in their passport, check them against warnings lists and do all of this, usually, in less than two minutes.If the officer is satisfied they will stamp the passport with one of a variety of wordings, (conditions), depending on the reason for the persons stay and apply a time limit according to pre-set criteria.The pressure on port immigration officers is to do this quickly so as to satisfy various targets concerning waiting times.