The BBC was found to have committed a "significant breach" of industry standards by not revealing that the narrator of a documentary about the Gaza conflict was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the programme 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 major oversight in relation to truthfulness".
The authority has instructed the broadcaster to broadcast a peak-time announcement about its conclusions.
"As this represents a significant violation of our code, we are ordering the corporation to broadcast a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," the statement read.
'Risk to Undermine Confidence'
The watchdog's announcement stated: "Our probe determined that the film's omission to reveal that the narrator's parent served in a post in the Hamas-controlled authority was materially misleading.
"It meant that the public did not have essential details which may have been extremely pertinent to their assessment of the narrator and the information he presented.
"Credibility is at the heart of the relationship between a broadcaster and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to damage the exceptionally strong degrees of confidence that the public would have invested in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from the BBC's streaming service in February after the boy's family links were revealed, and in this past July an broadcaster's internal assessment determined it breached the corporation's content policies on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the date and language are confirmed."
