The BBC was found to have committed a "significant breach" of broadcasting rules by failing to disclose that the narrator of a programme about the Gaza situation was the son of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had previously apologised, stating there had been "a serious error in relation to factual correctness".
Ofcom has directed the BBC to broadcast a peak-time declaration about its conclusions.
"Since this amounts to a major infringement of our regulations, we are ordering the corporation to broadcast a message of our findings against it on the BBC's second channel at 9pm, with a date to be determined," the regulator stated.
'Possibility to Undermine Credibility'
The regulator's statement said: "Our investigation concluded that the programme's failure to disclose that the voice's parent occupied a role in the Hamas-run administration was significantly deceptive.
"It meant that the public did not have critical information which may have been very significant to their judgment of the voice and the details he shared.
"Credibility is at the heart of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to erode the very considerable degrees of trust that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the online platform in the month of February after the presenter's familial connections were revealed, and in the month of July an internal BBC review concluded it infringed the corporation's content policies on accuracy.
A BBC spokesperson commented: "The authority's determination is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept Ofcom's decision in its entirety. We will follow the directive as soon as the schedule and language are determined."
