11.—(1) The Upper Tribunal may give an order adding, substituting or removing a party as an appellant or a respondent including where—
(a)the wrong person has been named as a party; or
(b)the addition, substitution or removal has become necessary because of a change in circumstances since the start of proceedings.
(2) If the Upper Tribunal gives an order under paragraph (1) it may give such consequential orders as it considers appropriate.
(3) A person who is not a party may make a written application to the Upper Tribunal to be added or substituted as a party under this rule.
(4) If the Upper Tribunal refuses an application under paragraph (3) it must consider whether to permit the person who made the application to provide submissions or evidence to the Upper Tribunal.