8. Permit to return: supplementary provision
(1) The Secretary of State may vary a permit to return.
(2) The Secretary of State may revoke a permit to return issued to an individual only if -
(a) the permit to return has been issued under section 6 and the individual asks the Secretary of State to revoke it;
(b) the permit to return has been issued under section 7(1) and the Secretary of State no longer considers that the individual is to be deported to the United Kingdom;
(c) the permit to return has been issued under section 7(2) and the Secretary of State no longer considers that, because of the urgency of the situation, the issue of the permit to return is expedient;
(d) the Secretary of State issues a subsequent permit to return to the individual; or
(e) the Secretary of State considers that the permit to return has been obtained by misrepresentation.