The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a film about Gaza was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the broadcaster to broadcast a prime-time announcement about its conclusions.
"Since this amounts to a serious breach of our code, we are directing the broadcaster to broadcast a message of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Potential to Erode Trust'
The authority's announcement stated: "Our probe concluded that the film's omission to reveal that the narrator's father held a position in the Hamas-run administration was substantially inaccurate.
"It meant that the audience did not have essential details which may have been highly relevant to their assessment of the presenter and the details he provided.
"Trust is at the heart of the connection between a television network and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the potential to damage the very considerable degrees of credibility that the public would have put in a BBC factual programme about the Gaza conflict."
The programme was withdrawn from the online platform in the month of February after the narrator's familial connections emerged, and in this past July an corporation's own inquiry concluded it breached the broadcaster's journalistic standards on factual correctness.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the date and wording are confirmed."
