It goes on my quote to do the GWN, so customer is agreeing to it when asking for the work to be carried out, just realised that I havent complied with Part P according to gas magazine thats just come in, well it looks like I aint gonna bother as it is just one thing too many, done absolutely everything else HE boiler,room/cylinder stat, t/valves, cleanser, logbook blah blah blah including a soakaway for the condense, might ask about doing the spark thingy when asc comes round next year, if I can put myself through it all again.