He began his education at the Würzburg teachers' seminary[3] but fled to Britain in 1939, escaping the persecution of Jews in Nazi Germany.
Zahn studied in Yeshivas Toras Emes in London under Rabbi Moshe Schneider.
[4] Zahn wrote V'gam Lishmonah on machshovah and Beis Shammai on the Torah.
[4] Zahn retired to Gateshead in 1999, where he continued to be an active member of the Jewish community until his death on 4 March 2001.
[8] A memorial brochure was published by the Sunderland Yeshiva, now based in Gateshead, in honour of Zahn after his death.