trauma

She said the scheme gives young people who have experienced trauma "the best second chance at life" but parents "feel real fear" about the changes.

It says low levels of education, unemployment, social segregation and refugee's war trauma are all causes - not the fact of being a migrant.

The operation to repair Froome's heart took place at the Sainte-Anne Toulon military hospital, which is the highest-level trauma centre in that part of France and specialises in thoracic surgery.

Atack added that confronting her online abuse was one of the hardest things she had ever done - she underwent therapy throughout the process because it had involved revisiting past trauma.

Another potential explanation is the ripple effect of trauma.