The BBC was found to have committed a "major breach" of industry standards by failing to disclose that the presenter of a documentary about Gaza was the child of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, noting there had been "a major oversight in relation to accuracy".
The authority has instructed the BBC to air a peak-time declaration about its findings.
"Given this constitutes a serious breach of our rules, we are instructing the broadcaster to broadcast a message of our findings against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Risk to Undermine Confidence'
The authority's announcement said: "The inquiry we conducted concluded that the programme's failure to disclose that the voice's father occupied a position in the Hamas-run authority was substantially inaccurate.
"It meant that the viewers did not have vital facts which may have been highly relevant to their evaluation of the narrator and the content he presented.
"Confidence is at the heart of the bond between a television network and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to erode the significantly high levels of credibility that viewers would have put in a BBC factual programme about the Gaza conflict."
The programme was pulled from the online platform in last February after the boy's personal associations emerged, and in this past July an corporation's own inquiry concluded it breached the broadcaster's editorial guidelines on factual correctness.
A BBC spokesperson said: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept Ofcom's decision in complete. We will adhere to the directive as soon as the timing and wording are finalised."
