Justices Act 1886

If any such conviction or order, complaint, and depositions, or certified copies, are so transmitted, and the offence charged or intended to be charged thereby appears to have been established, and the judgment of the justices thereupon to have been in substance warranted, and the defects or errors appear to be defects of form only, or mistakes not affecting the substantial merits of the proceedings before the justices, the court or judge shall allow the warrant of commitment, and may allow the conviction or order also, to be forthwith amended in all necessary particulars in accordance with the facts, and the person committed shall thereupon be remanded to the person’s former custody.