Athletics star Mo Farah wants to tell the truth about himself and his horrible childhood.
- I was born in Somaliland in northern Somalia as Hussein Abdi Kahin.
Regardless of what I have said before, my parents have never lived in the UK, he says in the BBC documentary.
Farah says that his father was killed in the civil war when Farah was four years old and that his family later split up.
- I was separated from my mother and taken to the UK illegally under the name of another child named Mohamed Farah.
The long-distance runner says that he thought he was going to Europe to live with some relatives and that he was taken through passport control as a nine-year-old Mohamed.
But when he arrived, he quickly realized that this was not the case and that the woman who smuggled him in did not want him well.
- If I wanted food, I had to look after the children, bathe them, cook and clean.
And she said that if I wanted to see my family again, I could not say anything, he says.
He finally told his sports teacher about the conditions at home and was taken to another family.
The teacher helped him apply for British citizenship under the name Mohamed Farah, which he received in 2000.
Farah says he wants to tell his story to raise the issue of trafficking and slavery.
- What really saved me, what made me different, was that I could run.