Hope you get it sorted. You will have to get the other heating engineer to check and recommission.
Thanks. At the moment, the original installer will be refused entry to property unless his employer confirms he is working on their behalf to rectify as I now feel he isn't registered to do the work as an indiviudal. Hence, the silence.
Ignorance is no excuse and I'm not blameless. He did say he was registered through his employer to install boilers & I accepted this. The fact he ordered the parts using his employers account & I paid his employer directly via bank transfer to their business bank account on the day of installation gave me (false) reassurance that this would be a legal install & that he was competent. I was promised an invoice in my name, hence why I paid his employer direct. However, this promise came from the installer, not his employer.
In my own profession, I can work for my employer & myself under the same annual registration with my professional body so it just didn't occur to me gas regulations work in a different way. Again, my fault for not double checking.
I'm at the stage where I just want the inspection logged by Gas Safe as quickly as possible so its harder for this to happen to anyone else & then pay to rectify asap if necessary.
The additional cost is at the very bottom of my list of concerns at the moment.
Again, thanks for the best wishes & honest response. In future, I'll pay the window cleaner cash but that's about it.