The BBC engaged in a "serious breach" of industry standards by not revealing that the presenter of a programme about the Gaza conflict was the son of a Hamas representative, according to regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had already issued an apology, noting there had been "a significant failing in relation to accuracy".
Ofcom has ordered the corporation to air a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our code, we are instructing the corporation to air a statement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be finalised," the statement read.
'Risk to Erode Trust'
The watchdog's announcement declared: "Our investigation concluded that the documentary's lack of disclosure that the narrator's father occupied a role in the Hamas-administered government was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been very significant to their judgment of the presenter and the details he shared.
"Credibility is at the center of the relationship between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the potential to undermine the significantly high degrees of trust that viewers would have placed in a BBC factual programme about the Israel-Gaza war."
The film was removed from iPlayer in the month of February after the narrator's familial connections emerged, and in this past July an internal BBC review concluded it breached the broadcaster's journalistic standards on accuracy.
A corporation official stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in full. We will follow the sanction as soon as the timing and wording are confirmed."
