Editing Yisroel Aryeh Leib Schneerson (section)

==== Different Versions of the Purpose of the Trip to England ====
The plan did not materialize, and about two years later he traveled to England - in the month of Iyar 5710 (1950), with the help of Mr. Shazar (Minister of Education at that time), he traveled to England to complete his studies. On the 21st of Iyar, he arrived in London and continued to the University in Liverpool. This is described in several versions:

In a forum on Chadrei Chareidim published in 5771 (2011), it was stated that Israel Aryeh Leib was the head of the Israeli nuclear program: "He was one of the leaders of Israel's nuclear program, and for this purpose he stayed in England."

On the Geulah website, it was published in 5776 (2016): Israel Aryeh Leib was sent to study in England with other Jews, to establish a pool of nuclear scientists in order to later begin producing atomic weapons to defend the Holy Land.

Rabbi Yosef Ashkenazi published in 5777 (2017) in the book "Rabbi Ashkenazi": "His friend Rabbi Nachum Goldschmidt related: Knesset member Yona Kesse knew R' Leibel well from Yekatrinoslav, he told Prime Minister David Ben-Gurion about R' Leibel's genius, suggesting that the state send him abroad to study sciences, and the knowledge he would acquire would be used upon his return to elevate the level and importance of these fields in Israel. The university decided to accept him and grant him a scholarship. The State of Israel for its part funded his plane ticket."
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Rabbi Eliyahu Shveicha published in 5780 (2020) a different version: His childhood friend, Knesset member Yona Kesse, met him one day on the street in Tel Aviv and asked how he was managing with his work. In response, Israel Aryeh Leib lowered his gaze, and with unusual but characteristic modesty, said that he had sent a paper on nuclear physics to the British Atomic Energy Commission, and based on the paper alone, they were inviting him there. He indeed traveled there and was accepted to be a scientist and member of this important committee. Yona Kesse noted with amazement the modesty with which Israel Aryeh Leib related this, and that he had to "extract" this information from him. He also noted the fact that even though Israel Aryeh Leib had not studied these subjects, he succeeded in writing a paper on the topic and was accepted to the committee based on the paper alone.

An additional version was published by Rabbi Moshe Ornstein, head of the Chabad Yeshiva in Netanya in 5783 (2023) - in the weekly Beit Moshiach, the weekly Kfar Chabad, and on the websites Chabad Info and Chabad Online, excerpts from a journal and recording of Yeshayahu Shar who was in his youth a frequent guest in the home of Rabbi Levi Yitzchak Schneerson and a friend of the sons, including the Rebbe and Israel Aryeh Leib. From the new material, and from information published in Toldot Levi Yitzchak, Igrot Kodesh, and Teshurah Naki 5780, new details emerge about Israel Aryeh Leib's niggun (melody) (see below), and also that apparently Israel Aryeh Leib's trip to England was connected to Prime Minister David Ben-Gurion's aspiration to produce an atomic bomb. From the new details, it appears that Israel Aryeh Leib was the first scientist who worked at the Weizmann Institute of Science on the outskirts of the city of Rehovot, and that his aliyah to Eretz Yisrael was for this purpose. He was invited by the Weizmann Institute to join its first workforce. Mr. Yeshayahu Shar recounted in 1969 that Israel Aryeh Leib was "one of the important figures whom Ben-Gurion sent to England in connection with the atom." In light of the new revelations and Mr. Shar's testimony, it is reasonable to assume that the aforementioned article Israel Aryeh Leib sent to the British Atomic Energy Commission was a cover story for the real matter: Israel's security and the development of its nuclear capabilities.

He stayed in England for only about two years and passed away due to cardiological issues. Today it is not known on behalf of which security body he operated and what information he transmitted on the subject of the atom. Much remains hidden. His role at the Weizmann Institute also remains ambiguous, and it is not known in what framework he operated. It is possible that the secretive roles caused the heavy fog surrounding his activities.