The BBC engaged in a "significant breach" of broadcasting rules by not revealing that the narrator of a film about the Gaza conflict was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, noting there had been "a significant failing in relation to accuracy".
The authority has instructed the broadcaster to transmit a prime-time announcement about its findings.
"Given this constitutes a significant violation of our code, we are directing the corporation to transmit a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a date to be finalised," it said.
'Potential to Erode Confidence'
The authority's announcement stated: "The inquiry we conducted found that the programme's failure to disclose that the presenter's father held a post in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the narrator and the information he presented.
"Credibility is at the core of the bond between a media organization and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the potential to damage the significantly high amounts of confidence that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The film was removed from the BBC's streaming service in last February after the boy's personal associations came to light, and in the month of July an internal BBC review concluded it breached the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster commented: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in complete. We will adhere to the penalty as soon as the date and language are finalised."
