You see this old argument of "i wouldnt sign of someones work" is just not thought through and flawed. Il put it like this does everyone on here who services boilers, fires, does CP12's etc say to the customer ok love before i start id like to see the install gas cert and service report for every service carried out since? most people dont have the manual and those that do the benchmark has been filled in with invisible ink.
I look at it this way, if the jobs unsafe, boom £*** disconection fee and £*** to put it straight. Someone mentioned what about the pipesize, what if its wrong...hell if i have to run a gas carcas from the front of the house to the back where the kitchen is i charge a whack. I also know that once ive finnished it will be safe for the family who live there so its a win win. To say i wouldnt sign that of is realy biting your own nose of to spite your face because i tell you what someone else will do it and it might not be someone who knows what there doing.