CP12 - is that the Landlords Safety Cert? If so, they won't accept it....and Gas Safe won't either if property not rented out.
Yes Becky a CP12 is a landlords/Home owners cert'.
Gas Safe probably won't like this as it harks back to Corgi documentation, and they're more interested in their own agenda.
I do however have one more idea!
I had to get an old box down from the wardbrobe so I hope you're grateful!! In the box was some old books of CP1 certificates. Otherwise known as 'Gas Safety Records'.
If I were in your shoes, I would risk getting one of these done for your install. (Lets hope the install is ok and it passes). Then just present this to the bloke from Building Control and confidently say:
'We've had the install checked out, it passes all saftey checks. Here's the certificate, I hope this brings the matter to a close'. Then just stay quiet and hope he goes with it.
Of course this is just a theory....but I would have a go. Taking the boiler off the wall and then putting it straight back on is bloody mindless. Who's benefitting from that? No reputable installer is going to thank you for that job.
On the flip side of all this, I have been asked to register (as we all do) other peoples work. I always refuse to do so. No ifs or buts. NO WAY. I was called to a boiler installed by someone else a couple of months ago. A DIY install. They thought they'd use the flue from their old boiler to save a few quid. Luckilly they couldn't get the boiler to light, because had it, they'd be pushing up daisy's.
Why it popped in my head is that they wanted me to register it so they could have it 'repaired' in its warranty period. After consulting with Gas Safe, I made the boiler safe, and fitted the right flue, but no I didn't register it.