sixth-form student silhan ozcelik , 18 , went from kurdish family 's home in october , while she was still only 17 .
the old bailey head how ozcelik travelled on the eurostar with another man to stuttgart , germany , where the kurdish workers ' party -lrb- pkk -rrb- youth movement have its headquarters .
sixth-form student silhan ozcelik , 18 , has been charged with one count of engaging in preparation for terrorist activity .