The BBC was found to have committed a "major breach" of broadcasting rules by not revealing that the narrator of a programme about the Gaza conflict was the child of a Hamas representative, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a serious error in relation to factual correctness".
Ofcom has ordered the BBC to air a peak-time announcement about its decisions.
"Since this amounts to a significant violation of our code, we are ordering the broadcaster to broadcast a message of our conclusions against it on BBC2 at nine o'clock in the evening, with a date to be finalised," it said.
'Risk to Erode Trust'
The authority's report declared: "Our investigation concluded that the programme's failure to disclose that the presenter's male guardian occupied a post in the Hamas-administered authority was materially misleading.
"Consequently that the audience did not have critical information which may have been very significant to their judgment of the presenter and the content he shared.
"Trust is at the center of the relationship between a television network and its audience, especially for a national broadcasting corporation such as the BBC.
"This error had the potential to undermine the significantly high degrees of credibility that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The programme was removed from the online platform in the month of February after the narrator's family links were revealed, and in this past July an broadcaster's internal assessment determined it violated the broadcaster's content policies on factual correctness.
A representative for the broadcaster commented: "The authority's determination is in accordance with the conclusions of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will comply with the directive as soon as the date and wording are confirmed."
