Thank you for sharing your experience, @2RedShoes that's the kind of thing I was wondering about! It sounds like it worked in your case, and having proof must have helped.
@Marni83 You can just write them yourself, and if you are thinking of, but haven't yet, taken legal action, they can be meaningful and provoke some action. I'm not sure that that's true, that a solicitor wouldn't "just write one". As you say, if the behaviour is illegal and with sufficient evidence, they seem to be pretty willing. I'm wondering if these actions provoke behaviours or whether they work, or perhaps reinforce good behaviour. I am aware that it needs to be illegal behaviour, I've done the research, but now am considering whether to send one or not. If one doesn't "just rock up" and ask for one, how else does such a letter get sent? I'm puzzled!
@CarlottaValdez It is for harassment. I am receiving repetitive phone messages from my father, and the last batch were of a sexually violent and aggressive nature. He has autism and is an alcoholic. I have already asked him to stop doing this, on a number of occasions, but I think that receiving this sort of letter from a solicitor, along with a call/visit from the police, would help him understand the severity of his actions.