London 'Slavery' Case: New Homes Investigated Detectives say they are investigating 13 addresses as part of their probe into claims that three women were held as slaves in London. The inquiry began after one of three alleged victims told a charity she had been kept against her will for more than 30 years in a house in south London. The three women - a 30-year-old Briton, a 57-year-old Irishwoman and a 69-year-old Malaysian - are believed to have suffered years of physical and mental abuse at the hands of a couple. Police carried out house-to-house enquiries over the weekend in and around Peckford Place in Brixton, where the three women were found. It has emerged that the couple - both 67 and of Indian and Tanzanian origin - were previously arrested in the 1970s, although police have not said why. Officers have recovered a birth certificate for the 30-year-old woman, who is believed to have lived her entire life in servitude, but no other official documents for her have been found. Police outside the property where the women were allegedly held The case came to light after the Irish woman rang the Freedom Charity last month after seeing its founder Aneeta Prem in a Sky News report about forced marriages. The Metropolitan Police said part of the agreement on October 25 when the women were removed from the address was that police would not take any action at that stage. None of the women was reported missing after being rescued, police said. All three are now in the care of a specialist non-governmental organisation. Some 37 officers from the Met's human-trafficking unit are working on the case. On Sunday, Home Secretary Theresa May said tackling modern slavery in Britain was a "personal priority," saying many other victims were "hidden in plain sight" across the country. "It is walking our streets, supplying shops and supermarkets, working in fields, factories or nail bars, trapped in brothels or cowering behind the curtains in an ordinary street: slavery," she wrote in The Sunday Telegraph.