We recently conducted a large survey of over 1300 therapists in the UK about their work with LGB clients who approach them wishing to change their sexual orientation. This report appears in the free access academic journal BMC Psychiatry.
We have also reviewed the world literature about the psychological problems suffered by gay and lesbian people. These difficulties appear to be the result of discrimination and prejudice. This report also appears in BMC Psychiatry.
The American Psychological Association has an important and informative document on its website about the normality of homosexuality and the case against trying to "treat" it as an illness. The Royal College of Psychiatrists has also published a similar statement as has the American Psychiatric Association.