The BBC was found to have committed a "significant breach" of broadcasting rules by omitting to mention that the presenter of a programme about the Gaza conflict was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An investigation by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The head of the BBC had already issued an apology, stating there had been "a significant failing in relation to accuracy".
The authority has instructed the broadcaster to broadcast a peak-time statement about its decisions.
"Since this amounts to a serious breach of our code, we are ordering the broadcaster to air a announcement of our findings against it on BBC2 at nine o'clock in the evening, with a date to be determined," it said.
'Potential to Damage Confidence'
The authority's report stated: "Our investigation determined that the programme's lack of disclosure that the narrator's parent held a role in the Hamas-controlled government was significantly deceptive.
"This implied that the audience did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the details he provided.
"Confidence is at the heart of the relationship between a broadcaster and its public, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to damage the very considerable degrees of credibility that the public would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from the BBC's streaming service in February after the presenter's personal associations came to light, and in July an internal BBC review concluded it breached the corporation's journalistic standards on truthfulness.
A BBC spokesperson said: "The authority's determination is in accordance with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in full. We will adhere to the directive as soon as the date and language are finalised."
