The British broadcaster committed a "significant breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas official, as determined by regulatory body Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to accuracy".
Ofcom has directed the broadcaster to broadcast a prime-time declaration about its conclusions.
"Given this constitutes a significant violation of our code, we are instructing the corporation to air a announcement of our determinations against it on BBC Two at 21:00, with a date to be confirmed," the regulator stated.
'Risk to Undermine Credibility'
The watchdog's report declared: "The inquiry we conducted found that the film's omission to reveal that the narrator's parent served in a position in the Hamas-run authority was materially misleading.
"This implied that the audience did not have vital facts which may have been very significant to their evaluation of the voice and the details he presented.
"Confidence is at the center of the relationship between a broadcaster and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to erode the very considerable amounts of trust that viewers would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the narrator's family links came to light, and in July an corporation's own inquiry determined it breached the organization's editorial guidelines on accuracy.
A representative for the broadcaster stated: "The authority's determination is in agreement with the findings of the internal assessment, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in its entirety. We will adhere to the directive as soon as the date and wording are confirmed."
