After perilous journeys fleeing human rights abuse in Eritrea, the four boys had arrived safely in the UK. Yet in the space of 16 months they were all dead. What went wrong?

For a while, the four teenage boys, Alex, Filmon, Osman and Mulue, did a reasonably good job of looking after each other. Filmon and Mulue had met in Eritrea before they embarked on their long, dangerous journey to Britain; the others became friends en route or in London, in a park near a Home Office registration centre for unaccompanied child refugees. Their similar backgrounds drew them together, as did the shared experience of travelling 3,300 miles in search of safety.

Mulue and Alex had both spent time in foster care before moving into independent accommodation; Osman and Filmon were living in a hostel in north London. They had all become used to surviving without parents, instead leaning on each other for support. All of them were also struggling with the unsettling reality of their precarious new lives, which was so different from the expectations they had clung to during their traumatic journeys.