(1) A public limited company may by notice in writing require a person whom the company knows or has reasonable cause to believe to be or, at any time during the 3 years immediately preceding the date on which the notice is issued (but excluding any time before the commencement of this section), to have been interested in shares comprised in the company's relevant share capital -
(a) to confirm that fact or (as the case may be) to indicate whether or not it is the case, and
(b) where he holds or has during that time held an interest in shares so comprised, to give such further information as may be required in accordance with the following subsection.
(2) A notice under this section may require the person to whom it is addressed -
(a) to give particulars of his own past or present interest in shares comprised in relevant share capital of the company (held by him at any time during the 3 year period mentioned in subsection (1)),
(b) where the interest is a present interest and any