A Coulsdon model who was allegedly kidnapped in Milan and detained for six days while her captor tried to auction her online has returned to the UK.

The 20-year-old woman, named in reports as Chloe Ayling, was allegedly attacked on July 11 by two men as she attended an arranged a photo shoot.

She is believed to have been drugged and transported in a bag to Borgial, an isolated village near Turin, before being released on July 17, Italian police said.

In a statement to police published by the Italian newspaper Corriere della Sera, Ms Ayling said: “A person wearing black gloves came up from behind and put one hand on my neck and the other on my mouth, while a second person, wearing a black balaclava, injected me in my right arm.

“I think I lost consciousness. When I woke up I was wearing a pink bodysuit and the socks I’m in now. 

"I realised I was in the boot of a car, with my wrists and ankles tied and my mouth taped. I was inside a bag, with only a small hole that allowed me to breathe.”

According to reports, Ms Ayling arrived back at her home in Coulsdon on monday, August 6, where she said she feared for her life during the "terrifying experience."

A Polish man, who lives in Britain, was arrested on July 18 on suspicion of kidnap and extortion, state police said.

Officials named the suspect as 30-year-old Lukasz Pawel Herba.

The National Crime Agency (NCA) said it has been assisting with the investigation.

A spokesman said: "A house in the Oldbury area linked to Lukasz Pawel Herba was searched on July 18 by Emsou officers with assistance from West Midlands Police.

"Computer equipment seized is being forensically examined."

It is alleged the men tried to sell Ms Ayling online for more than 300,000 dollars (£230,000) and demanded the model's agent pay to secure her safe release.

She was kept handcuffed to furniture but was freed after six days and taken to the British consulate in Milan, despite the ransom not being paid, police said.

It has been reported the captor demanded £50,000 upon her release and threatened to kill her if she told police about the incident.

Milan police officer Lorenzo Bucossi told reporters the group the suspect was allegedly working for offered "mercenary services" on the dark web.