The BBC was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the presenter of a documentary about the Gaza conflict was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
Ofcom has ordered the corporation to broadcast a prime-time statement about its decisions.
"Given this constitutes a major infringement of our rules, we are instructing the corporation to transmit a statement of our determinations against it on BBC Two at 21:00, with a timing to be finalised," it said.
'Risk to Undermine Confidence'
The watchdog's announcement said: "Our investigation concluded that the film's failure to disclose that the presenter's parent held a post in the Hamas-run administration was substantially inaccurate.
"This implied that the public did not have critical information which may have been highly relevant to their assessment of the presenter and the details he shared.
"Credibility is at the heart of the bond between a television network and its public, especially for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to undermine the significantly high levels of trust that the public would have invested in a factual film from the broadcaster about the conflict in Gaza."
The film was removed from the online platform in February after the narrator's personal associations were revealed, and in the month of July an corporation's own inquiry found it violated the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the conclusions of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in complete. We will follow the penalty as soon as the date and wording are finalised."
