The Care Act Advocate would do this (write a Report – that sort of a document is regarded in the Advocacy regulations as what the advocate SHOULD do) from their own perceptions and using their own initiative if the person lacked capacity and from the features of being the advocate if the person in question had some capacity (ie substantial difficulties) and was asking for that to be done, and the advocate thought that the person’s rights were being ignored or overridden. The advocate can’t just be told to do it. They are not a free source of legal advice about all aspects of a person’s rights.
