17.—(1) The parties to an appeal shall be the appellant and the Secretary of State.
(2) If the United Kingdom Representative of the United Nations High Commissioner for Refugees (the “United Kingdom Representative”) gives written notice that he wishes to be treated as a party to the appeal, he shall be so treated from the date of the notice.
(3) Any restriction imposed by or under these Rules in relation to the appellant as to the disclosure of material, attendance at hearings, notification of directions or decisions and communications with the special advocate, applies to the United Kingdom Representative.