The BBC was found to have committed a "significant breach" of media regulations by failing to disclose that the presenter of a documentary about Gaza was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "substantially inaccurate".
The head of the BBC had previously apologised, noting there had been "a serious error in relation to truthfulness".
The regulator has ordered the corporation to air a evening declaration about its conclusions.
"Since this amounts to a significant violation of our regulations, we are ordering the broadcaster to broadcast a announcement of our findings against it on the BBC's second channel at 21:00, with a timing to be confirmed," the statement read.
'Potential to Damage Confidence'
The regulator's statement said: "Our investigation concluded that the documentary's lack of disclosure that the narrator's father held a role in the Hamas-run authority was materially misleading.
"This implied that the viewers did not have essential details which may have been very significant to their evaluation of the presenter and the information he provided.
"Confidence is at the core of the bond between a media organization and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the risk to damage the exceptionally strong levels of credibility that viewers would have invested in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from the online platform in the month of February after the presenter's family links emerged, and in this past July an internal BBC review found it violated the broadcaster's editorial guidelines on factual correctness.
A BBC spokesperson stated: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in complete. We will follow the sanction as soon as the timing and wording are confirmed."
