The public service broadcaster committed a "major breach" of broadcasting rules by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the broadcaster to transmit a evening announcement about its decisions.
"As this represents a major infringement of our code, we are directing the broadcaster to transmit a statement of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Risk to Damage Confidence'
The watchdog's statement declared: "Our investigation concluded that the programme's omission to reveal that the voice's parent served in a post in the Hamas-run government was significantly deceptive.
"It meant that the audience did not have essential details which may have been extremely pertinent to their evaluation of the voice and the details he provided.
"Credibility is at the heart of the bond between a television network and its viewers, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to undermine the very considerable levels of credibility that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from the BBC's streaming service in February after the narrator's family links came to light, and in July an broadcaster's internal assessment determined it infringed the corporation's editorial guidelines on factual correctness.
A BBC spokesperson said: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with Ofcom's decision in complete. We will adhere to the sanction as soon as the date and wording are finalised."
