I have had three severely bad therapists. You know how you can read reviews about books or products? I...
I'm not sure how the sites work for reviewing in the U.K.
Look at the link that
@lostforgottensoul linked here
Slander and defamation lawsuits are limited and can be hard to pursue for the person claiming they're defamed.
The most important thing is avoiding giving someone an opportunity to claim defamation, everything you say has to be true, which is hard to prove
in something subjective like therapy.
Posting in a blog about a bad experience with any professional isn't slander, If you name the person you then should make a point of stating it was your personal experience. Such as " I had this experience with so and so " and not " He is like this and that ". It's stating an experience, not making generalized declarations of the person or their practice.
Another wording rule is to say " I dont recommend him for this type of therapy" instead of something like " dont go to Dr. Blah Blah.".
To file a defamation suit someone has to have reasonable and valid documentation that their business or personal life has been impacted by your actions.
If they dont have that, then they need to pay someone to argue why they anticipate significant damage for them to be able to take it to court
In reality, if this therapist saw your blog and was pissed off over it, they would likely have an attorney send you a cease and desist warning asking you to take it down.
I'd like to point out that a letter like that doesn't mean that you have to, or that there's any legal basis for the request to remove it. It's a scare tactic. It just means they were irritated enough pay their lawyer a couple hundred quid to write it up and send it.
In reviewing forums like yelp you really dont have to be as careful. I know that often doctors and lawyers that have bad reviews hire clean up crews to get them off reviewing sites in the States. That costs less than suing people and keeps the publicity of the problem away.