22Paragraph 11 (variation of contract without valid reason) does not include a term by which a supplier of financial services reserves the right to alter the rate of interest payable by or due to the consumer, or the amount of other charges for financial services without notice where there is a valid reason, if—
(a)the supplier is required to inform the consumer of the alteration at the earliest opportunity, and
(b)the consumer is free to dissolve the contract immediately.