The BBC committed a "serious breach" of broadcasting rules by not revealing that the presenter of a documentary about the Gaza conflict was the son of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had already issued an apology, noting there had been "a major oversight in relation to accuracy".
The regulator has instructed the BBC to broadcast a peak-time declaration about its findings.
"Since this amounts to a major infringement of our regulations, we are ordering the broadcaster to air a message of our conclusions against it on BBC2 at 9pm, with a timing to be confirmed," the regulator stated.
'Risk to Undermine Trust'
The authority's statement declared: "The inquiry we conducted concluded that the documentary's omission to reveal that the narrator's father served in a position in the Hamas-run authority was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been extremely pertinent to their judgment of the narrator and the details he provided.
"Trust is at the center of the relationship between a television network and its viewers, notably for a state-funded media outlet such as the BBC.
"This oversight had the possibility to erode the significantly high levels of trust that audiences would have placed in a factual film from the broadcaster about the conflict in Gaza."
The film was pulled from iPlayer in the month of February after the narrator's family links emerged, and in July an corporation's own inquiry determined it infringed the broadcaster's editorial guidelines on factual correctness.
A corporation official said: "The regulator's decision is in agreement with the results of the internal assessment, that there was a significant failing in the film in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we agree with Ofcom's decision in full. We will comply with the directive as soon as the timing and wording are confirmed."
