Human trafficking is a booming business in Britain, with 47 people prosecuted for the offence last year alone.
ITV News Correspondent Juliet Bremner speaks to a female victim who was forced to have sex with men by her captors, and the detective who arrested the couple she managed to flee from.
Four Romanian men are receiving support after being recovered in a human trafficking raid in Wiltshire, police have said.
The men, all aged between 25 and 45, were discovered in a commercial property in Melksham this morning, working in what officers described as "exploited circumstances".
The discovery was made during a joint operation between HMRC and Wiltshire Police. The men now being looked after by the Salvation army.
Anyone with information relating to human trafficking is urged to report it to their local police force by dialling 101. Alternatively, they can call Crimestoppers on 0800 555 111 and give information anonymously if preferred.
In total the number of cases involving Britons or the UK as country of origin rose 173% to 90; of those, 63 were children.
Of the number of minors identified as potential victims, 45 were classed as possible domestic servitude (up 2% on 2012), 123 as labour exploitation (up 24%) and 138 were unknown (up 9%).
Of the adults, 141 were classed as domestic servitude (up 18%), 511 labour exploitation (89% rise), 581 sexual exploitation (53% rise), and 62 unknown (up 44%).
New NCA figures on trafficking show that for children the most common nationality or country of origin was Vietnam, followed by the UK and then Albania.
The figures are the number of cases highlighted under the National Referral Mechanism (NRM), used to bring possible victims to the authorities' attention.
The NCA said that 1,746 people from 112 different countries were highlighted as as potential victims of traffickers last year, up 47% on the previous year. Nearly two thirds of those referred were female (1,122) and around a quarter (450) were children.
The number of UK-born children identified as being trafficked for sexual abuse more than doubled last year.
Data released by the National Crime Agency (NCA) showed that 56 minors who are from the UK were flagged up as potential victims of trafficking for sexual exploitation in 2013, a rise of 155% on the previous year.
It is not clear whether they were being taken out of the country or moved within the UK, the NCA said. The number of foreign children identified as being at risk also rose by 11%, to 88.
Spanish and French police have caught a gang that have been allegedly smuggling Chinese citizens into Britain and the United States.
The Spanish government says 75 people have been arrested, 51 in Spain and 24 in France - including two suspected heads of the organisation in Europe based in Barcelona.
The gang allegedly charged up to 50,000 euros (£43,000) to transport Chinese nationals to the US, Britain, Spain, France, Greece, Italy and Turkey.
Some of the people trafficked ended up in the sex trade, the Interior Ministry says.
The gang's main European hub was Barcelona airport. It allegedly used the city as a stopping-off point while false documents were prepared.
The number of people being trafficked into the UK is rising, the Government warned today.
A report published on human trafficking found that 946 potential victims of trafficking were referred to the authorities.
712 were adults and 234 were children. This compares with 710 referrals in 2010, of which 524 were adults and 186 were minors. The Child Exploitation and Online Protection Centre (Ceop) estimates there are approximately 300 child trafficking victims in the UK per annum.
The report said that organised criminal gangs within countries including China, Nigeria, Vietnam, Slovakia and Romania now pose the greatest threat to the UK, where they exploit their victims for sex, labour and domestic slavery.