Child migrants brought to the UK from Calais are disappearing feared to have been entrapped in slavery and prostitution by their traffickers. David Simmonds, chairman of the asylum, migration, and refugee task force at of child migrants held in the House of Commons just before the Jungle demolition. Unaccompanied child migrants brought to the UK from Calais are disappearing, feared to have been entrapped in slavery and prostitution by. Why have so many unaccompanied migrant children gone missing Young boy cycling in the Calais ' Jungle ' Those children might then be pushed into prostitution or slavery. He left the refugee camp in Greece and disappeared. made it to Calais where he made dozens of attempts to get to Britain. Some of the children brought to Britain from the Calais “ Jungle ” six into prostitution or slavery, according to councils and support workers. Child refugees 'lost to prostitution and slavery ' About unaccompanied child refugees came to the UK from the Jungle camp in CalaisDan disappeared and may have been drawn into prostitution or modern slavery. children brought to Britain from the Calais Jungle into prostitution or slavery, Council leaders have reported that some have disappeared.