The High Court may, on an application under this subsection, by order annul a Convention adoption or Convention adoption order on the ground that the adoption is contrary to public policy.
The High Court may, on an application under this subsection—
by order provide for an overseas adoption or a determination under section 91 to cease to be valid on the ground that the adoption or determination is contrary to public policy or that the authority which purported to authorise the adoption or make the determination was not competent to entertain the case, or
decide the extent, if any, to which a determination under section 91 has been affected by a subsequent determination under that section.
The High Court may, in any proceedings in that court, decide that an overseas adoption or a determination under section 91 is to be treated, for the purposes of those proceedings, as invalid on either of the grounds mentioned in subsection (2)(a).
Subject to the preceding provisions, the validity of a Convention adoption, Convention adoption order or overseas adoption or a determination under section 91 cannot be called in question in proceedings in any court in England and Wales.