The BBC engaged in a "serious breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to accuracy".
The authority has instructed the corporation to broadcast a prime-time announcement about its conclusions.
"As this represents a major infringement of our rules, we are directing the corporation to air a announcement of our determinations against it on BBC2 at 21:00, with a schedule to be finalised," the statement read.
'Possibility to Undermine Confidence'
The authority's statement stated: "The inquiry we conducted concluded that the film's omission to reveal that the presenter's male guardian held a position in the Hamas-controlled administration was significantly deceptive.
"It meant that the public did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the details he provided.
"Confidence is at the heart of the bond between a broadcaster and its viewers, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the potential to erode the significantly high amounts of trust that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was pulled from the online platform in the month of February after the narrator's family links came to light, and in July an broadcaster's internal assessment determined it infringed the organization's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The authority's determination is in line with the results of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in full. We will comply with the sanction as soon as the timing and language are finalised."
