The BBC committed a "major breach" of media regulations by not revealing that the presenter of a documentary about the Gaza situation was the child of a Hamas representative, as determined by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
The regulator has ordered the BBC to broadcast a prime-time statement about its decisions.
"Given this constitutes a major infringement of our rules, we are directing the BBC to transmit a statement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," the statement read.
'Potential to Damage Credibility'
The watchdog's statement said: "Our probe determined that the programme's failure to disclose that the narrator's parent occupied a position in the Hamas-controlled authority was materially misleading.
"It meant that the public did not have critical information which may have been extremely pertinent to their evaluation of the presenter and the information he provided.
"Confidence is at the center of the connection between a television network and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This failing had the risk to erode the very considerable levels of trust that viewers would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was withdrawn from the BBC's streaming service in the month of February after the narrator's family links were revealed, and in July an corporation's own inquiry determined it infringed the corporation's content policies on factual correctness.
A BBC spokesperson commented: "The regulator's decision is in agreement with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with Ofcom's decision in complete. We will follow the directive as soon as the timing and language are confirmed."
