The public service broadcaster was found to have committed a "serious breach" of industry standards by failing to disclose that the narrator of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to accuracy".
Ofcom has directed the broadcaster to broadcast a prime-time declaration about its findings.
"Since this amounts to a major infringement of our rules, we are instructing the corporation to broadcast a announcement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Erode Trust'
The regulator's statement said: "The inquiry we conducted determined that the programme's failure to disclose that the voice's male guardian served in a position in the Hamas-administered government was materially misleading.
"This implied that the audience did not have critical information which may have been highly relevant to their assessment of the narrator and the details he provided.
"Confidence is at the heart of the bond between a broadcaster and its viewers, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the risk to erode the exceptionally strong levels of trust that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The programme was removed from the online platform in last February after the narrator's personal associations were revealed, and in July an broadcaster's internal assessment concluded it infringed the corporation's journalistic standards on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in complete. We will follow the directive as soon as the schedule and wording are determined."
