The British broadcaster committed a "significant breach" of broadcasting rules by failing to disclose that the narrator of a film about the Gaza situation was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The head of the BBC had earlier expressed regret, saying there had been "a significant failing in relation to accuracy".
The regulator has ordered the corporation to transmit a peak-time announcement about its findings.
"As this represents a major infringement of our rules, we are instructing the BBC to transmit a announcement of our determinations against it on the BBC's second channel at 9pm, with a timing to be determined," the statement read.
'Risk to Undermine Confidence'
The regulator's statement stated: "Our probe concluded that the programme's lack of disclosure that the narrator's parent served in a position in the Hamas-run administration was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been highly relevant to their assessment of the voice and the information he shared.
"Trust is at the heart of the connection between a media organization and its viewers, especially for a national broadcasting corporation such as the BBC.
"This error had the risk to damage the very considerable degrees of credibility that the public would have placed in a BBC factual programme about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in February after the presenter's personal associations emerged, and in this past July an broadcaster's internal assessment found it infringed the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the regulator's ruling in full. We will follow the directive as soon as the timing and language are finalised."
