In numbers: People trafficking in Nigeria

The UK's first Anti-Slavery Commissioner Kevin Hyland has made Nigeria a high priority, as latest figures reveal a rise in the number potential trafficking victims brought to the UK.

Read: Rise in numbers of Nigerians trafficked to the UK

Here are some facts about the issue.

• Hundreds of Nigerians brought into the UK every year for forced labour or prostitution, this includes men, women, and children.

• Latest figures from the National Crime Agency reveal that more than 2,000 potential trafficking victims were referred to the authorities in 2014 - 244 of whom were from Nigeria.

• The Home Office estimates there are between 10,000 and 13,000 potential victims of slavery in the UK.

• The Modern Slavery Act, under which Kevin Hyland's post was established, was passed this year. It is the first legislation of its kind in Europe.

• Nigeria is one of the world's main source countries of human trafficking. It is also the key African source country for women trafficked for the sex trade.

• The country's Edo State is the hub of its trafficking crisis.

• Around half those arrested for trafficking in Edo State are women.

• Italy is the most popular destination for Nigerian trafficking. It is estimated there are as many as 10,000 Nigerian prostitutes.

• Nigeria's National Agency For The Prohibition of Trafficking in Persons (NAPTIP) was set up in 2003.

• To date, NAPTIP have rescued 6000 victims - but in 2014 only 19 traffickers were convicted.

Video report by ITV News presenter Julie Etchingham: