12.—(1) Where—

(a) any cause of action in respect of the conversion or wrongful detention of a chattel has accrued to any person, and

(b) before he recovers possession of the chattel, a further conversion or wrongful detention takes place,

then, subject to section 26, no action shall be brought in respect of the further conversion or wrongful detention after the expiration of six years from the accrual of the cause of action in respect of the original conversion or wrongful detention.

(2) Where—

(a) any cause of action in respect of the conversion or wrongful detention of a chattel has accrued to any person, and

(b) the period fixed for bringing that action and for bringing any action in respect of such a further conversion or wrongful detention as is mentioned in subsection (1) of this section has expired, and

(c) he has not during that period recovered possession of the chattel,

then, subject to section 26, the title of that person to the chattel shall be extinguished.