A file of reports and memoranda discussing the problems caused by Jewish former employees of British intelligence who had had access to classified information before emigrating to Israel and entering government service there. The file includes a report listing various former members of staff, their work in Britain, and the information they would have had access to, including the Enigma decryption at Bletchley Park. The documents also discuss possible counter-measures, while stressing the importance of not seeming to be instigating a witch-hunt against British Jews.