I agree 👍🏼 Also, I know this might not be an option but if you can raise your rates a little, choose a more upmarket location if you can and brand yourself as more 'high class' (just fake it) this usually gets rid of the idiots. Also if you suspect someone is a reviewer say after the session that you don't allow reviews because of privacy concerns, it helps x
Do you only have an AW profile? If you don't already, especially in London, a website advertised on lots of directories and with good SEO can be a help. I find it also makes you less victim to the review culture, because most of those hobbyists are AW users, but there are other, less pedantic, joyless clients coming from elsewhere, and although they seem to be fewer in number, I find them nicer 