If you allow somebody who isn't  a Gas Safe-registered engineer to inspect or work on a fuel boiler, cooker or fire in your home, they gained't be qualified to do the work safely. http://www.megaten.ru/url/go/aHR0cDovL2tpbmctd2lmaS53aW4vL2luZGV4LnBocD90aXRsZT1vcnRpemNvbWJzNTEwMQ