Primark continued to investigate the allegations for three years, concluding that BBC report was a fake. In 2011, following an investigation by the BBC Trust's Editorial Standards Committee, the BBC announced, "Having carefully scrutinised all of the relevant evidence, the committee concluded that, on the balance of probabilities, it was more likely than not that the Bangalore footage was not authentic." BBC subsequently apologised for faking footage, and returned the television award for investigative reporting.
What did the BBC do? (If the question is unanswerable, say "unanswerable")
apologised for faking footage