There have been a number of incidents recently where evacuations have been required that have thankfully seen all pax and crew relatively unharmed. Significant improvements in on board design and furnishings from a fire safety perspective have given pax more safety margin than ever before. It is important to remember though that external fire, given the right conditions, can breach a fuselage in as little as 20 seconds. Once this has occurred interior conditions will deteriorate very quickly without an effective intervention. There really is no justification whatsoever for not immediately heading to the nearest available exit, as quickly as possible, when directed to. A review of the accident investigation into the British Airtours 737 incident at Manchester in 1985 is a very good case in point of a survivable incident in which many people (55) died due to an inadequate evacuation and a rapid interior fire escalation.