The BBC was found to have committed a "serious breach" of broadcasting rules by not revealing that the narrator of a documentary about the Gaza situation was the child of a Hamas representative, according to British broadcasting authority Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to factual correctness".
The regulator has ordered the corporation to air a prime-time declaration about its decisions.
"Since this amounts to a serious breach of our rules, we are directing the broadcaster to air a message of our findings against it on BBC Two at 9pm, with a date to be confirmed," the statement read.
'Potential to Undermine Confidence'
The regulator's statement stated: "Our probe found that the film's lack of disclosure that the voice's male guardian served in a role in the Hamas-run authority was substantially inaccurate.
"Consequently that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the presenter and the details he presented.
"Confidence is at the core of the bond between a television network and its public, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to damage the significantly high levels of confidence that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The film was removed from iPlayer in last February after the boy's familial connections were revealed, and in the month of July an corporation's own inquiry concluded it breached the broadcaster's content policies on accuracy.
A BBC spokesperson said: "The regulator's decision is in line with the results of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in full. We will comply with the directive as soon as the schedule and language are determined."
