public function ReplyForm($comment)
    {
        // Enables multiple forms with different names to use the same handler
        $form = $this->CommentsForm();
        $form->setName('ReplyForm_' . $comment->ID);
        $form->setHTMLID(null);
        $form->addExtraClass('reply-form');

        // Load parent into reply form
        $form->loadDataFrom([
            'ParentCommentID' => $comment->ID
        ]);

        // Customise action
        $form->setFormAction($this->Link('reply', $comment->ID));

        $this->extend('updateReplyForm', $form);

        return $form;
    }