The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the voice of a documentary about the Gaza conflict was the son of a Hamas representative, according to UK media regulator Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had earlier expressed regret, noting there had been "a serious error in relation to factual correctness".
Ofcom has ordered the broadcaster to transmit a evening announcement about its conclusions.
"As this represents a significant violation of our regulations, we are ordering the BBC to air a statement of our findings against it on BBC Two at 9pm, with a timing to be confirmed," the statement read.
'Possibility to Undermine Confidence'
The regulator's announcement declared: "The inquiry we conducted concluded that the programme's lack of disclosure that the presenter's male guardian served in a role in the Hamas-administered government was substantially inaccurate.
"Consequently that the audience did not have vital facts which may have been highly relevant to their assessment of the presenter and the content he presented.
"Credibility is at the core of the connection between a broadcaster and its viewers, particularly for a state-funded media outlet such as the BBC.
"This error had the possibility to damage the significantly high degrees of confidence that audiences would have put 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 personal associations came to light, and in the month of July an internal BBC review determined it violated the broadcaster's content policies on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in line with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept Ofcom's decision in complete. We will comply with the sanction as soon as the date and language are confirmed."
