8 EAny person who has been refused compensation under this Schedule or is receiving or has received compensation may apply to the mission and pastoral committee for a grant or renewal of the compensation or, as the case may be, an increase of the compensation (whether by way of an increase of periodical payments or a lump sum payment or both), on the ground that circumstances of which account was taken under paragraph 6 or 7 have materially altered to his or her disadvantage, and the mission and pastoral committee may grant or renew the compensation or make an increase on that ground, and an appeal shall lie to the Appeal Tribunal against the refusal of any such application.