Professor Simon Wessely warned authorities against a knee-jerk reaction . He said: 'People are going to be very concerned about the impact of this on their daily lives. Germanwings co-pilot had a 'serious psychosomatic illness ' , police said .
Professor Simon Wessely warned authorities against a knee-jerk reaction . 42 British commercial pilots are currently on medication for depression . Germanwings co-pilot had a 'serious psychosomatic illness ' , police said .