The BBC committed a "serious breach" of industry standards by failing to disclose that the voice of a programme about the Gaza situation was the child of a Hamas administrator, according to UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to accuracy".
The authority has ordered the BBC to broadcast a prime-time announcement about its decisions.
"Since this amounts to a major infringement of our regulations, we are ordering the corporation to air a message of our findings against it on the BBC's second channel at 9pm, with a schedule to be finalised," it said.
'Possibility to Damage Confidence'
The authority's statement said: "The inquiry we conducted determined that the film's omission to reveal that the voice's parent occupied a position in the Hamas-run government was materially misleading.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their assessment of the voice and the content he presented.
"Trust is at the heart of the connection between a media organization and its audience, notably for a public service broadcaster such as the BBC.
"This oversight had the possibility to erode the significantly high levels of trust that the public would have put in a factual film from the broadcaster about the Israel-Gaza war."
The programme was removed from the online platform in last February after the presenter's family links emerged, and in the month of July an broadcaster's internal assessment found it breached the organization's content policies on factual correctness.
A BBC spokesperson commented: "The authority's determination is in line with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in complete. We will adhere to the penalty as soon as the schedule and language are finalised."
