Britain should pay 90,000 euros (78,590 pounds) in compensation to two Vietnamese men who were convicted of drug crimes despite signs they had been trafficked as children and forced to work on cannabis farms, Europe’s top rights court ruled. The European Court of Human Rights (ECHR) said Britain had failed to protect potential victims of child trafficking in a case dating back to 2009, and breached two articles relating to the prohibition of forced labour and the right to a fair trial.