No writ of habeas corpus shall issue out of England, by authority of any judge or court of justice therein, into any colony or foreign dominion of the Crown where Her Majesty has a lawfully established court or courts of justice having authority to grant and issue the said writ, and to ensure the due execution thereof throughout such colony or dominion.
Provided, that nothing in this Act contained shall affect or interfere with any right of appeal to Her Majesty in Council now by law existing.