The Jewish Agency in Israel exists to provide information about Israel and to support Jews to emigrate there. The London office is at Balfour House, 741 High Road, Finchley, London N12 0BQ. A person going to the UK on behalf of the Jewish Agency would be expected to work in the office of the Agency, lecturing, providing information about Israel. A person sent by the Agency for employment with another Jewish organisation or with an employer in the UK will require a work permit.
However, if the letter from the Agency states that the person is just a representative of the agency further enquiries should be made with the candidate to establish exactly what employment he intends to take.
Relevant foreign nationals who are granted entry clearance for longer than 6 months should be required to register with the police.