What is there to complain about? They are replacing her are they not? In which case, they are still providing a service. Whether you particularly liked one HV is a mute point. "We need to put a stop to this as we may well end up with a person who simply doesnt understand us and our darling babies" Not only is this vomit inducing, but it's a nonsense. I know some HVs are better than others (most of the ones I've met were useless), but they do however need to be qualified, so as long as the new person has an appropriate qualification, they are doing nothing at all wrong. Would you complain to the education department if your child's favourite teacher moved on? No, because that is what happens in life.