The BBC engaged in a "major breach" of broadcasting rules by failing to disclose that the voice of a documentary about the Gaza situation was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog 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".
Ofcom has directed the corporation to broadcast a evening announcement about its findings.
"Since this amounts to a significant violation of our regulations, we are ordering the BBC to transmit a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be finalised," the statement read.
'Risk to Erode Credibility'
The watchdog's statement said: "Our investigation determined that the documentary's failure to disclose that the voice's parent occupied a role in the Hamas-run administration was substantially inaccurate.
"It meant that the viewers did not have essential details which may have been highly relevant to their judgment of the narrator and the details he provided.
"Trust is at the heart of the bond between a broadcaster and its public, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This oversight had the risk to undermine the exceptionally strong amounts of credibility that audiences would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in last February after the presenter's personal associations were revealed, and in the month of July an internal BBC review found it breached the broadcaster's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The authority's determination is in agreement with the conclusions of Peter Johnston's review, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the regulator's ruling in complete. We will comply with the directive as soon as the date and wording are determined."
