The BBC committed a "significant breach" of broadcasting rules by failing to disclose that the narrator of a film about Gaza was the offspring of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to accuracy".
The regulator has instructed the broadcaster to transmit a evening statement about its conclusions.
"Given this constitutes a serious breach of our rules, we are directing the broadcaster to air a message of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," it said.
'Potential to Undermine Credibility'
The regulator's announcement said: "Our probe concluded that the documentary's failure to disclose that the narrator's father occupied a position in the Hamas-run government was significantly deceptive.
"It meant that the audience did not have critical information which may have been highly relevant to their judgment of the presenter and the details he presented.
"Trust is at the heart of the connection between a media organization and its public, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to damage the very considerable levels of trust that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The programme was pulled from iPlayer in February after the presenter's familial connections came to light, and in this past July an internal BBC review concluded it infringed the corporation's journalistic standards on accuracy.
A BBC spokesperson commented: "The regulator's decision is in line with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the authority's determination in complete. We will comply with the directive as soon as the date and language are determined."
