Gabriel Diaz de Tudanca is a 19-year-old Spaniard who, although born a girl, identified as male from early childhood.
"When I was three years old I came back from school and said to my mother that when I grew up I was going to be a man called Oscar," he says.
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"The hate and intolerance of others comes from ignorance about trans people," he says.
Writing by Sonya Dowsett