The BBC committed a "serious breach" of media regulations by failing to disclose that the presenter of a film about the Gaza conflict was the offspring of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a significant failing in relation to accuracy".
The authority has ordered the BBC to air a peak-time announcement about its findings.
"Since this amounts to a significant violation of our code, we are ordering the corporation to air a statement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," the regulator stated.
'Potential to Undermine Credibility'
The watchdog's statement stated: "Our probe found that the film's lack of disclosure that the presenter's male guardian held a post in the Hamas-administered authority was significantly deceptive.
"Consequently that the public did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the information he presented.
"Credibility is at the core of the connection between a television network and its public, particularly for a public service broadcaster such as the public broadcaster.
"This error had the potential to erode the significantly high levels of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The programme was pulled from iPlayer in last February after the presenter's family links came to light, and in this past July an corporation's own inquiry concluded it breached the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in accordance 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 accuracy, which aligns with Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept Ofcom's decision in full. We will adhere to the directive as soon as the date and wording are determined."
