The head of the film division of the Ministry of Information was a man named Sidney Bernstein.
https://en.wikipedia.org/wiki/Sidney_Be ... _Bernstein
Bernstein was Jewish and evidently did some spying for the Soviets.
The television baron responsible for creating Granada TV was a Soviet informer, say newly declassified files.
An MI5 dossier says Sidney Bernstein, later Baron Bernstein, helped the Soviet Embassy to vet journalists applying to go to Moscow and provided funds for a Czech-German agitator named Otto Katz, said to have been Marlene Dietrich’s first husband. He was known for persuading Hollywood stars to contribute to the Anti-Nazi League, a Communist front, A Security Service report from 1936 on Bernstein, then a cinema magnate, stated: “Sidney Bernstein is now reliably reported to be an active secret Communist . . . He always cuts the news films in his cinemas so that Fascist scenes etc which might make a favourable impression are removed. Items about Russia are given prominence.”
The suspicions were confirmed in November 1938, when it emerged that Bernstein was making inquiries on behalf of the Soviet Embassy about the “suitability of newspaper correspondents who are proposing to go to Russia and who are applying for visas”.
In 1940 he was appointed a film adviser to the Ministry of Information, but only after his political views had been vetted.
Bernstein renounced his links with the Communist Party in 1939 when the Soviet Union signed the non-aggression pact with Germany, but MI5 said: “It would be unwise to accept this statement at face value.” Bernstein was ennobled in 1969. He died in 1993.
https://www.thetimes.com/travel/destina ... 6pxnvn9rmm
Bernstein visited Belsen on April 22, 1945. A lot of footage was shot, but it seems the Brits had trouble getting it all edited. In late June Hitchcock was finally brought in as a "treatment advisor," whatever that means, but a final cut was not ready at that time. The usual title for the Hitchcock project is
German Concentration Camps Factual Survey.
Further reading: Janina Struk,
Photographing the Holocaust, Ch 6
It was not shown until 1985 by PBS, apparently under the alternate title,
Memory of the Camps.