The BBC was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a film about Gaza was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "substantially inaccurate".
The BBC's director general had already issued an apology, saying there had been "a significant failing in relation to truthfulness".
The regulator has directed the BBC to air a evening statement about its findings.
"Since this amounts to a significant violation of our regulations, we are ordering the broadcaster to air a statement of our conclusions against it on BBC Two at 21:00, with a timing to be finalised," it said.
'Potential to Erode Trust'
The regulator's announcement stated: "The inquiry we conducted concluded that the film's failure to disclose that the voice's father served in a role in the Hamas-administered administration was significantly deceptive.
"This implied that the audience did not have essential details which may have been very significant to their judgment of the narrator and the details he provided.
"Confidence is at the core of the connection between a media organization and its audience, especially for a state-funded media outlet such as the BBC.
"This failing had the risk to damage the significantly high levels of trust that audiences would have placed in a BBC factual programme about the conflict in Gaza."
The documentary was pulled from the online platform in last February after the narrator's family links emerged, and in the month of July an internal BBC review concluded it violated the organization's journalistic standards on accuracy.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of the corporation's inquiry, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the date and wording are confirmed."
