The BBC engaged in a "major breach" of broadcasting rules by failing to disclose that the narrator of a programme about the Gaza situation was the child of a Hamas administrator, according to regulatory body Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a serious error in relation to truthfulness".
The regulator has ordered the broadcaster to transmit a evening announcement about its findings.
"As this represents a significant violation of our code, we are directing the broadcaster to broadcast a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Possibility to Undermine Trust'
The regulator's statement said: "Our probe determined that the film's lack of disclosure that the presenter's father served in a role in the Hamas-run government was materially misleading.
"It meant that the viewers did not have essential details which may have been highly relevant to their assessment of the narrator and the content he shared.
"Credibility is at the core of the relationship between a television network and its public, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to erode the exceptionally strong amounts of trust that audiences would have invested in a BBC factual programme about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the narrator's personal associations came to light, and in the month of July an internal BBC review found it breached the organization's content policies on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the results of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in complete. We will follow the directive as soon as the timing and wording are confirmed."
