The British broadcaster committed a "significant breach" of media regulations by not revealing that the presenter of a programme about the Gaza conflict was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to factual correctness".
Ofcom has directed the broadcaster to broadcast a evening statement about its findings.
"Since this amounts to a major infringement of our code, we are ordering the broadcaster to air a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," it said.
'Potential to Undermine Confidence'
The regulator's announcement said: "Our probe determined that the documentary's omission to reveal that the voice's father held a post in the Hamas-controlled administration was significantly deceptive.
"This implied that the viewers did not have critical information which may have been highly relevant to their evaluation of the presenter and the details he provided.
"Trust is at the center of the relationship between a media organization and its audience, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to damage the exceptionally strong levels of trust that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was pulled from the online platform in February after the narrator's family links emerged, and in this past July an broadcaster's internal assessment found it breached the broadcaster's journalistic standards on accuracy.
A representative for the broadcaster said: "The authority's determination is in accordance with the results of Peter Johnston's review, that there was a significant failing 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 expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the directive as soon as the date and language are confirmed."
