Sex-criminal financier Jeffrey Epstein housed women he allegedly abused in several London flats in the years after UK police decided not to investigate him, a BBC investigation has revealed.

We found evidence of four flats, rented in the affluent borough of Kensington and Chelsea, in receipts, emails, and bank records contained within the Epstein files. Six of the women housed in them have since come forward as victims of Epstein's abuse.

Many of them - from Russia, eastern Europe and elsewhere - were brought to the UK after the Metropolitan Police decided not to investigate Virginia Giuffre's 2015 allegation that she had been a victim of international trafficking to London.

The Met said it followed reasonable lines of inquiry at the time, interviewing Giuffre on multiple occasions following her complaint and cooperating with US investigators.

Some of the women housed in the London flats were coerced by Epstein to recruit others into his sex trafficking scheme, as well as regularly transported to Paris by Eurostar to visit him, according to emails in the files.

The BBC searched through millions of pages of records gathered by the US Department of Justice in its investigation of the disgraced financier, revealing the extent of his operations in the UK and highlighting missed opportunities for police investigation.

British police had other opportunities to launch inquiries into Epstein's activities in the UK, besides Giuffre's complaint regarding alleged trafficking and involvement with Andrew Mountbatten-Windsor, who has denied any wrongdoing.

The investigation raises critical questions about the responsibilities of law enforcement and the state in responding to credible allegations of human trafficking.

Tessa Gregory, a human rights lawyer, stated that where credible allegations exist, the UK state must conduct independent investigations, emphasizing that no inquiry was launched despite the evidence at hand.

Evidence collected shows that Epstein continued to operate his trafficking network unabated and that many of his victims were unprotected and unaware of the extent of his involvement in human trafficking.