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Videos posted to TikTok place him in the city since July 2022, showing the smuggler outside the iconic Hagia Sophia and a Pakistani supermarket.

Sophia - not her real name - said she paid more than £2,000 in fees to a South Yorkshire care company that sponsored her visa to come to the UK from Zimbabwe to work for them in 2023.

Sophia came to the UK on a health and care worker visa, designed to help plug staffing gaps in the sector.

Sophia added that she was threatened with having her Certificate of Sponsorship terminated - a document provided by an employer that is required for the visa to be valid.

"You're supposed to be quiet, so we had to suffer in silence," Sophia said.