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 son of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a significant failing in relation to factual correctness".
The authority has ordered the BBC to broadcast a peak-time statement about its conclusions.
"Since this amounts to a serious breach of our code, we are directing the BBC to air a message of our conclusions against it on the BBC's second channel at 9pm, with a schedule to be determined," it said.
'Possibility to Erode Trust'
The watchdog's statement declared: "The inquiry we conducted concluded that the documentary's lack of disclosure that the presenter's male guardian held a role in the Hamas-run administration was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been very significant to their judgment of the presenter and the content he provided.
"Trust is at the heart of the connection between a broadcaster and its public, especially for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the exceptionally strong levels of credibility that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from iPlayer in last February after the narrator's familial connections came to light, and in the month of July an corporation's own inquiry determined it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the corporation's content standards on truthfulness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in full. We will comply with the directive as soon as the schedule and wording are confirmed."
