The BBC engaged in a "major breach" of media regulations by not revealing that the narrator of a film about the Gaza conflict was the child of a Hamas official, according to UK media regulator Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the corporation to air a prime-time declaration about its conclusions.
"Given this constitutes a serious breach of our rules, we are ordering the corporation to transmit a message of our conclusions against it on the BBC's second channel at nine o'clock in the evening, with a timing to be finalised," it said.
'Risk to Damage Trust'
The regulator's announcement declared: "Our probe determined that the documentary's failure to disclose that the voice's parent occupied a post in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have critical information which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Trust is at the center of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to undermine the significantly high levels of confidence that audiences would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The film was withdrawn from the online platform in last February after the presenter's familial connections emerged, and in the month of July an internal BBC review concluded it infringed the corporation's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The Ofcom ruling is in agreement with the conclusions of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the timing and wording are confirmed."
