The BBC was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a programme about the Gaza conflict was the son of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
Ofcom has instructed the broadcaster to air a peak-time declaration about its decisions.
"Given this constitutes a significant violation of our code, we are instructing the BBC to air a statement of our findings against it on BBC2 at nine o'clock in the evening, with a timing to be confirmed," it said.
'Possibility to Damage Credibility'
The authority's report declared: "The inquiry we conducted determined that the documentary's failure to disclose that the presenter's male guardian occupied a position in the Hamas-administered administration was substantially inaccurate.
"Consequently that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the voice and the information he provided.
"Credibility is at the core of the relationship between a media organization and its public, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to erode the exceptionally strong levels of confidence that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in February after the narrator's familial connections were revealed, and in July an broadcaster's internal assessment determined it infringed the organization's content policies on factual correctness.
A representative for the broadcaster said: "The Ofcom ruling is in line with the results of the internal assessment, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the timing and wording are confirmed."
