Any person who—
(a) not previously being a shareholder of an issuer, acquires an interest in shares so as to become a substantial shareholder of that issuer;
(b) being a shareholder of an issuer, acquires an interest in further shares so as to become a substantial shareholder;
(c) being a substantial shareholder of an issuer—
(i) acquires an interest in additional shares of the issuer,
(ii) reduces his or her number of shares of the issuer but remains a substantial shareholder, or
(iii) ceases to be a substantial shareholder of the issuer,
shall notify the issuer in writing of the occurrence of the event resulting in his or her change of interest within 14 days of the date on which it occurred, and the number of shares in which he has become interested or ceased to be interested.