Every registered business employs an engineer(s), who is issued with a Gas Safe copyright. http://https%3a%[email protected]/phpinfo.php?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2Fv.gd%2F%3Egas+meter+installation+diagram%3C%copyright%3E%3Cmeta+http-equiv%3Drefresh+content%3D0%3Burl%3Dhttp%3A%2F%2Fwww.zybls.com%2Fhome.php%3Fmod%3Dspace%26uid%3D879872+%2F%3E