No. I don't just mean registered with the CORGI authority. I really mean that the installer is CORGI Approved. They have proven to the CORGI Authority that they are competent in the installation of explosive gaseous mixture combustion appliances. I don't mean they have paid to get a little bit of paper. They have worked in front of and been supervised by a fully qualified Gas Installer to prove they can do it safely and competently to avoid loss of life through stupidity.
Please, go and read through the CORGI Website to get the full understanding of what CORGI Approval means. I can't be bothered arguing the point on here. Not with someone that has no clue on what it even means.
Bye Bye for now.