public function redirectionLink()
    {
        // Check external redirect
        if ($this->RedirectionType == 'External') {
            return $this->ExternalURL ?: null;
        }

        // Check internal redirect
        /** @var SiteTree $linkTo */
        $linkTo = $this->LinkToID ? SiteTree::get()->byID($this->LinkToID) : null;
        if (empty($linkTo)) {
            return null;
        }

        // We shouldn't point to ourselves - that would create an infinite loop!  Return null since we have a
        // bad configuration
        if ($this->ID == $linkTo->ID) {
            return null;
        }

        // If we're linking to another redirectorpage then just return the URLSegment, to prevent a cycle of redirector
        // pages from causing an infinite loop.  Instead, they will cause a 30x redirection loop in the browser, but
        // this can be handled sufficiently gracefully by the browser.
        if ($linkTo instanceof RedirectorPage) {
            return $linkTo->regularLink();
        }

        // For all other pages, just return the link of the page.
        return $linkTo->Link();
    }