The BBC was found to have committed a "major breach" of industry standards by not revealing that the narrator of a film about the Gaza situation was the offspring of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to air a peak-time announcement about its conclusions.
"As this represents a significant violation of our code, we are instructing the BBC to air a announcement of our findings against it on the BBC's second channel at 9pm, with a schedule to be finalised," the statement read.
'Possibility to Erode Credibility'
The regulator's announcement declared: "The inquiry we conducted found that the programme's omission to reveal that the narrator's male guardian held a role in the Hamas-run administration was significantly deceptive.
"It meant that the audience did not have vital facts which may have been very significant to their judgment of the presenter and the content he provided.
"Credibility is at the heart of the connection between a television network and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to erode the exceptionally strong degrees of trust that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The documentary was withdrawn from the online platform in the month of February after the narrator's family links were revealed, and in this past July an internal BBC review determined it infringed the broadcaster's editorial guidelines on accuracy.
A corporation official said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the sanction as soon as the timing and language are confirmed."
