We're currently renovating our flat, and have had some plumbing work done, including having a new unvented electric cylinder installed. We're currently getting everything signed off by our BCO and need to get the certification for the boiler install. Trouble is that the plumber has gone AWOL and isn't returning any of our messages or calls. Real shame cos he did a good job on it all. Does anyone have any advice on how we go about getting the work certified? If we can't get hold of him, is this something another plumber can do in retrospect? Cheers in advance!