86.—(1) Evidence at a hearing may be given in person or by written statement, but, subject to the provisions of these Rules, the First-tier Tribunal may at any stage of the proceedings require the personal attendance of the maker of a written statement.
(2) A party shall only be permitted to give evidence by written statement if such statement is submitted prior to the expiry of the case statement period or at any other time with the consent of the other party and with the approval of a legal member or the First-tier Tribunal at a hearing.
(3) A legal member or the First-tier Tribunal may at the start of a hearing, on the application of either party or on their own initiative, determine that a witness be allowed to give evidence by telephone, video link or any other means of communication, if satisfied that this would not prejudice the achievement of the overriding objective.