The BBC engaged in a "major breach" of media regulations by failing to disclose that the narrator of a programme about Gaza was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a serious error in relation to accuracy".
Ofcom has directed the corporation to air a prime-time announcement about its conclusions.
"As this represents a major infringement of our regulations, we are directing the broadcaster to transmit a announcement of our conclusions against it on the BBC's second channel at 21:00, with a date to be determined," it said.
'Possibility to Damage Credibility'
The authority's report declared: "Our investigation determined that the film's omission to reveal that the presenter's parent served in a position in the Hamas-controlled government was significantly deceptive.
"Consequently that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the content he presented.
"Confidence is at the center of the connection between a television network and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to undermine the exceptionally strong levels of credibility that audiences would have placed in a BBC factual programme about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in the month of February after the presenter's familial connections came to light, and in this past July an corporation's own inquiry concluded it infringed the broadcaster's content policies on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in complete. We will comply with the directive as soon as the date and wording are determined."
