art 9 Amendment of application
(1) The applicant may amend the application only with the permission of the tribunal. (2) Where the tribunal grants permission under paragraph (1) it may do so on such terms as it thinks fit, and shall give such further or consequential directions as may be necessary. (3) The tribunal shall not grant permission to amend in order to add a new ground for contesting the decision unless:– (a) such ground is based on matters of law or fact which have come to light since the application was made; or (b) it was not practicable to include that ground in the application; or (c) the circumstances are exceptional.