The BBC was found to have committed a "significant breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the offspring of a Hamas representative, according to regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, saying there had been "a major oversight in relation to accuracy".
Ofcom has instructed the BBC to broadcast a evening statement about its decisions.
"Given this constitutes a major infringement of our code, we are instructing the BBC to transmit a announcement of our conclusions against it on BBC Two at 9pm, with a date to be determined," the statement read.
'Risk to Undermine Credibility'
The watchdog's announcement stated: "The inquiry we conducted concluded that the programme's omission to reveal that the presenter's male guardian held a role in the Hamas-run government was materially misleading.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the content he provided.
"Credibility is at the heart of the bond between a television network and its public, especially for a public service broadcaster such as the BBC.
"This failing had the possibility to erode the exceptionally strong amounts of confidence that viewers would have put in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from iPlayer in February after the presenter's family links were revealed, and in July an internal BBC review found it violated the organization's content policies on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the documentary in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will follow the sanction as soon as the timing and wording are confirmed."
