The BBC committed a "major breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
Ofcom has instructed the BBC to air a prime-time announcement about its decisions.
"Given this constitutes a major infringement of our regulations, we are ordering the broadcaster to air a announcement of our conclusions against it on the BBC's second channel at 21:00, with a schedule to be confirmed," the regulator stated.
'Possibility to Erode Confidence'
The regulator's report said: "Our probe concluded that the documentary's lack of disclosure that the presenter's parent occupied a post in the Hamas-administered authority was substantially inaccurate.
"It meant that the public did not have vital facts which may have been very significant to their evaluation of the presenter and the information he provided.
"Credibility is at the heart of the relationship between a television network and its audience, notably for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the potential to undermine the significantly high amounts of confidence that audiences would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was withdrawn from the online platform in February after the presenter's family links came to light, and in July an broadcaster's internal assessment found it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the regulator's ruling in full. We will comply with the directive as soon as the timing and wording are determined."
