The BBC committed a "significant breach" of industry standards by failing to disclose that the narrator of a documentary about Gaza was the offspring of a Hamas official, as determined by British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The regulator has instructed the BBC to broadcast a peak-time announcement about its findings.
"Given this constitutes a significant violation of our code, we are ordering the broadcaster to transmit a announcement of our conclusions against it on BBC Two at 9pm, with a schedule to be determined," the regulator stated.
'Possibility to Erode Confidence'
The regulator's report declared: "The inquiry we conducted found that the film's failure to disclose that the presenter's father occupied a position in the Hamas-administered government was materially misleading.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the information he presented.
"Trust is at the center of the connection between a media organization and its audience, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the possibility to undermine the very considerable amounts of credibility that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in last February after the narrator's family links emerged, and in July an broadcaster's internal assessment found it infringed the broadcaster's content policies on accuracy.
A representative for the broadcaster said: "The Ofcom ruling 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 accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we accept Ofcom's decision in full. We will follow the penalty as soon as the schedule and language are confirmed."
