The BBC was found to have committed a "significant breach" of media regulations by omitting to mention that the voice of a film about Gaza was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
The regulator has directed the BBC to broadcast a peak-time declaration about its decisions.
"Since this amounts to a serious breach of our rules, we are instructing the BBC to broadcast a announcement of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be finalised," the regulator stated.
'Potential to Erode Credibility'
The watchdog's announcement said: "The inquiry we conducted determined that the film's failure to disclose that the presenter's father occupied a position in the Hamas-run government was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the content he shared.
"Trust is at the heart of the bond between a broadcaster and its audience, notably for a public service broadcaster such as the BBC.
"This error had the possibility to erode the very considerable degrees of credibility that viewers would have placed in a BBC factual programme about the Israel-Gaza war."
The film was removed from the online platform in the month of February after the narrator's familial connections came to light, and in this past July an internal BBC review found it breached the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in accordance with the conclusions of the corporation's inquiry, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with Ofcom's decision in full. We will adhere to the sanction as soon as the date and language are confirmed."
