The BBC was found to have committed a "serious breach" of industry standards by omitting to mention that the narrator of a documentary about the Gaza situation was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a major oversight in relation to truthfulness".
The regulator has ordered the broadcaster to broadcast a evening announcement about its findings.
"Since this amounts to a serious breach of our rules, we are instructing the corporation to broadcast a statement of our conclusions against it on the BBC's second channel at 9pm, with a timing to be finalised," the statement read.
'Possibility to Damage Trust'
The watchdog's report stated: "Our investigation found that the programme's omission to reveal that the presenter's parent held a post in the Hamas-run government was substantially inaccurate.
"Consequently that the audience did not have essential details which may have been very significant to their assessment of the presenter and the details he shared.
"Trust is at the heart of the bond between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to erode the exceptionally strong degrees of trust that the public would have invested in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was pulled from the online platform in February after the narrator's familial connections were revealed, and in this past July an internal BBC review determined it violated the corporation's journalistic standards on truthfulness.
A BBC spokesperson commented: "The authority's determination is in agreement with the results of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the schedule and language are finalised."
