A court by or before which a person is convicted of—
an offence under section 18 relating to the display of written material, or
an offence under section 19, 21 or 23,
shall order to be forfeited any written material or recording produced to the court and shown to its satisfaction to be written material or a recording to which the offence relates.
An order made under this section shall not take effect—
in the case of an order made in proceedings in England and Wales, until the expiry of the ordinary time within which an appeal may be instituted or, where an appeal is duly instituted, until it is finally decided or abandoned;
in the case of an order made in proceedings in Scotland, until the expiration of the time within which, by virtue of any statute, an appeal may be instituted or, where such an appeal is duly instituted, until the appeal is finally decided or abandoned.
For the purposes of subsection (2)(a)—
an application for a case stated or for leave to appeal shall be treated as the institution of an appeal, and
where a decision on appeal is subject to a further appeal, the appeal is not finally determined until the expiry of the ordinary time within which a further appeal may be instituted or, where a further appeal is duly instituted, until the further appeal is finally decided or abandoned.
For the purposes of subsection (2)(b) the lodging of an application for a stated case or note of appeal against sentence shall be treated as the institution of an appeal.