Withdrawal of appealE+W+S
12. A person who has made an appeal under regulation 11 may withdrawthat appeal—
(a)before the hearing begins by giving notice in writing of his intention to withdraw the appeal to the Appeal Tribunal to whom the appeal was made and with the consent in writing of the Secretary of State;
(b)after the hearing has begun and before the determination is made, with the leave of the chairman of the Appeal Tribunal.