The benchmark log book has been ticked No for " has an inhibitor been used", he has used Feraquest to cleanse the system.
As for check his credentials, we got his details off the Corgi site!! which I must say I have now absolutely no faith in. The comment that he is a "cowboy" is an understatement, the missing inhibitor is one of 19 serious to critical errors he has made. No isolation switch fitted, terminal block used to run spur off ringmain to a fused spur( 1 mm cable used between ringmain and spur!), 3amp terminal block (wrapped with a cursory amount of black tape ) used to connect 2 wires, one to thermastat the other to unit mains plug( he did this because he had broken the mains plug and had to reroute the cable due to initially placing the thermastat in the bedroom not the hall as was our requirement), no earth bonding, etc...etc... the list goes on. We have contacted an electrian who is in the process of correcting the "deathtrap", however, I am now concerned ref the Gas fitting, having no faith whatsoever in Corgi how can I find a reliable non cowboy engineer to check out his work?