I find this all very strange. As a UKCP registered psychotherapist of over thirty years in practice I can say that I have never had or heard of any training, never seen a book or professional paper regarding how to perform conversion therapy. We are a profession that does a very great deal of reading and publishing!
I,ve never come across a patient who has previously received any conversion therapy from a psychotherapist ,,counsellor, psychologist or psychiatrist.
Quite simply, we don’t offer this; because there isn’t any credible basis for doing so.
And as far as I recall , Freud didn’t offer this either.
I be interested to know what the experience of members of the other professional bodies has been.