The public service broadcaster committed a "serious breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas administrator, according to regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to accuracy".
Ofcom has ordered the BBC to broadcast a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our code, we are ordering the corporation to air a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the regulator stated.
'Risk to Erode Credibility'
The regulator's statement declared: "The inquiry we conducted concluded that the film's lack of disclosure that the narrator's parent served in a role in the Hamas-run administration was significantly deceptive.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the content he presented.
"Confidence is at the center of the bond between a media organization and its viewers, notably for a public service broadcaster such as the BBC.
"This error had the risk to erode the significantly high amounts of trust that the public would have put in a factual film from the broadcaster about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the presenter's family links came to light, and in the month of July an broadcaster's internal assessment determined it infringed the organization's journalistic standards on accuracy.
A representative for the broadcaster stated: "The authority's determination is in agreement with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with the authority's determination in full. We will follow the directive as soon as the timing and language are finalised."
