Doing a gas check yesterday for a landlord which I just started doing little bits for, now the units above the work top were only 430mm high instead of the 460mm required, I've looked in my books and the in safe situation book but can't find what category it comes under as there's no scorching under unit was unsure if it was NCS or AR as I have no MI I can only use the min requirements from my book but don't want to steam in AR it as its been there forever and passed every year, also he mite think this is grief and use the old plumber to pass it, I no this doesn't make it right but am trying to make a living here