The BBC engaged in a "major breach" of industry standards by not revealing that the presenter of a film about the Gaza situation was the son of a Hamas official, according to regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, noting there had been "a major oversight in relation to accuracy".
The authority has instructed the corporation to broadcast a peak-time statement about its conclusions.
"Since this amounts to a serious breach of our regulations, we are directing the corporation to air a statement of our determinations against it on BBC Two at 21:00, with a timing to be confirmed," it said.
'Possibility to Damage Trust'
The watchdog's statement declared: "The inquiry we conducted concluded that the film's omission to reveal that the voice's male guardian held a role in the Hamas-controlled authority was materially misleading.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the information he presented.
"Confidence is at the core of the bond between a media organization and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the possibility to undermine the significantly high degrees of trust that viewers would have placed in a BBC factual programme about the conflict in Gaza."
The programme was removed from the BBC's streaming service in February after the narrator's familial connections were revealed, and in this past July an corporation's own inquiry determined it infringed the broadcaster's journalistic standards on factual correctness.
A corporation official commented: "The authority's determination is in line with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept the authority's determination in complete. We will comply with the penalty as soon as the timing and wording are confirmed."
