The BBC committed a "significant breach" of media regulations by failing to disclose that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The BBC's director general had already issued an apology, saying there had been "a significant failing in relation to factual correctness".
Ofcom has directed the broadcaster to air a evening statement about its conclusions.
"As this represents a major infringement of our regulations, we are instructing the broadcaster to broadcast a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," the statement read.
'Possibility to Erode Trust'
The regulator's statement stated: "The inquiry we conducted found that the film's lack of disclosure that the voice's parent held a post in the Hamas-controlled authority was significantly deceptive.
"It meant that the audience did not have essential details which may have been highly relevant to their judgment of the narrator and the information he shared.
"Confidence is at the core of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong degrees of trust that audiences would have put in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from iPlayer in last February after the boy's family links were revealed, and in this past July an corporation's own inquiry found it infringed the corporation's content policies on factual correctness.
A corporation official commented: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we accept the regulator's ruling in its entirety. We will follow the directive as soon as the timing and wording are confirmed."
