Norbert Brainin
Because of Brainin's Jewish origin, he was driven out of Vienna after Hitler's Anschluss of 1938, as were the violinist Siegmund Nissel and violist Peter Schidlof. Brainin and Schidlof met in a British internment camp.  Like many Jewish refugees who came to the UK for safety, they became "aliens" and were kept in confinement.