The BBC was found to have committed a "serious breach" of broadcasting rules by not revealing that the voice of a programme about Gaza was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to factual correctness".
Ofcom has directed the broadcaster to transmit a prime-time statement about its findings.
"Since this amounts to a serious breach of our rules, we are ordering the BBC to transmit a message of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be confirmed," the regulator stated.
'Risk to Damage Confidence'
The authority's announcement declared: "Our probe found that the documentary's lack of disclosure that the presenter's male guardian occupied a position in the Hamas-administered administration was significantly deceptive.
"It meant that the audience did not have vital facts which may have been highly relevant to their evaluation of the narrator and the information he provided.
"Credibility is at the heart of the bond between a broadcaster and its audience, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to damage the significantly high levels of confidence that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The film was withdrawn from the BBC's streaming service in last February after the boy's family links came to light, and in July an internal BBC review determined it infringed the organization's editorial guidelines on factual correctness.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the results 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 aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in full. We will comply with the directive as soon as the timing and language are confirmed."
