The BBC engaged in a "significant breach" of media regulations by failing to disclose that the narrator of a documentary about the Gaza conflict was the child of a Hamas representative, as determined by regulatory body Ofcom.
An probe by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The authority has instructed the broadcaster to broadcast a peak-time announcement about its findings.
"Given this constitutes a major infringement of our regulations, we are ordering the corporation to broadcast a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a date to be finalised," the statement read.
'Risk to Erode Credibility'
The authority's announcement declared: "The inquiry we conducted found that the film's omission to reveal that the presenter's father held a role in the Hamas-administered government was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the narrator and the content he shared.
"Confidence is at the core of the relationship between a broadcaster and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to erode the significantly high amounts of credibility that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from the BBC's streaming service in February after the presenter's personal associations emerged, and in the month of July an corporation's own inquiry determined it infringed the broadcaster's editorial guidelines on factual correctness.
A corporation official commented: "The regulator's decision is in agreement with the findings of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will comply with the directive as soon as the timing and wording are confirmed."
